diff --git a/lib/ace/css/editor.css b/lib/ace/css/editor.css
index da284a2e..73702bdf 100644
--- a/lib/ace/css/editor.css
+++ b/lib/ace/css/editor.css
@@ -148,10 +148,22 @@
     box-sizing: border-box;
 }
 
-.ace_cursor.ace_hidden {
+.ace_hidden-cursors .ace_cursor {
     opacity: 0.2;
 }
 
+.ace_smooth-blinking .ace_cursor {
+       -moz-transition: opacity 0.18s;
+    -webkit-transition: opacity 0.18s;
+         -o-transition: opacity 0.18s;
+        -ms-transition: opacity 0.18s;
+            transition: opacity 0.18s;
+}
+
+.ace_cursor[style*="opacity: 0"]{
+    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
+}
+
 .ace_editor.ace_multiselect .ace_cursor {
     border-left-width: 1px;
 }
diff --git a/lib/ace/keyboard/emacs.js b/lib/ace/keyboard/emacs.js
index a1248759..8fc3aeeb 100644
--- a/lib/ace/keyboard/emacs.js
+++ b/lib/ace/keyboard/emacs.js
@@ -66,7 +66,7 @@ exports.handler.attach = function(editor) {
                 opacity: 1;\
                 background-color: transparent;\
             }\
-            .emacs-mode .ace_cursor.ace_overwrite {\
+            .emacs-mode .ace_overwrite-cursors .ace_cursor {\
                 opacity: 1;\
                 background-color: transparent;\
                 border-width: 0 0 2px 2px !important;\
diff --git a/lib/ace/layer/cursor.js b/lib/ace/layer/cursor.js
index 9d688b57..a15e7581 100644
--- a/lib/ace/layer/cursor.js
+++ b/lib/ace/layer/cursor.js
@@ -40,9 +40,12 @@ var Cursor = function(parentEl) {
 
     this.isVisible = false;
     this.isBlinking = true;
+    this.blinkInterval = 1000;
+    this.smoothBlinking = false;
 
     this.cursors = [];
     this.cursor = this.addCursor();
+    dom.addCssClass(this.element, "ace_hidden-cursors");
 };
 
 (function() {
@@ -57,20 +60,33 @@ var Cursor = function(parentEl) {
     };
 
     this.setBlinking = function(blinking) {
-        this.isBlinking = blinking;
-        if (blinking)
+        if (blinking != this.isBlinking){
+            this.isBlinking = blinking;
             this.restartTimer();
+        }
+    };
+
+    this.setBlinkInterval = function(blinkInterval) {
+        if (blinkInterval != this.blinkInterval){
+            this.blinkInterval = blinkInterval;
+            this.restartTimer();
+        }
+    };
+
+    this.setSmoothBlinking = function(smoothBlinking) {
+        if (smoothBlinking != this.smoothBlinking) {
+            this.smoothBlinking = smoothBlinking;
+            if (smoothBlinking)
+                dom.addCssClass(this.element, "ace_smooth-blinking");
+            else
+                dom.removeCssClass(this.element, "ace_smooth-blinking");
+            this.restartTimer();
+        }
     };
 
     this.addCursor = function() {
         var el = dom.createElement("div");
-        var className = "ace_cursor";
-        if (!this.isVisible)
-            className += " ace_hidden";
-        if (this.overwrite)
-            className += " ace_overwrite";
-
-        el.className = className;
+        el.className = "ace_cursor";
         this.element.appendChild(el);
         this.cursors.push(el);
         return el;
@@ -86,43 +102,53 @@ var Cursor = function(parentEl) {
 
     this.hideCursor = function() {
         this.isVisible = false;
-        for (var i = this.cursors.length; i--; )
-            dom.addCssClass(this.cursors[i], "ace_hidden");
-        clearInterval(this.blinkId);
+        dom.addCssClass(this.element, "ace_hidden-cursors");
+        this.restartTimer();
     };
 
     this.showCursor = function() {
         this.isVisible = true;
-        for (var i = this.cursors.length; i--; )
-            dom.removeCssClass(this.cursors[i], "ace_hidden");
-
-        this.element.style.visibility = "";
+        dom.removeCssClass(this.element, "ace_hidden-cursors");
         this.restartTimer();
     };
 
     this.restartTimer = function() {
-        clearInterval(this.blinkId);
-        if (!this.isBlinking)
-            return;
-        if (!this.isVisible)
+        clearInterval(this.intervalId);
+        clearTimeout(this.timeoutId);
+        if (this.smoothBlinking)
+            dom.removeCssClass(this.element, "ace_smooth-blinking");
+        for (var i = this.cursors.length; i--; )
+            this.cursors[i].style.opacity = "";
+
+        if (!this.isBlinking || !this.blinkInterval || !this.isVisible)
             return;
 
-        var element = this.cursors.length == 1 ? this.cursor : this.element;
-        this.blinkId = setInterval(function() {
-            element.style.visibility = "hidden";
-            setTimeout(function() {
-                element.style.visibility = "";
-            }, 400);
-        }, 1000);
+        if (this.smoothBlinking)
+            setTimeout(function(){
+                dom.addCssClass(this.element, "ace_smooth-blinking");
+            }.bind(this));
+
+        var blink = function(){
+            this.timeoutId = setTimeout(function() {
+                for (var i = this.cursors.length; i--; ) {
+                    this.cursors[i].style.opacity = 0;
+                }
+            }.bind(this), 0.6 * this.blinkInterval);
+        }.bind(this);
+
+        this.intervalId = setInterval(function() {
+            for (var i = this.cursors.length; i--; ) {
+                this.cursors[i].style.opacity = "";
+            }
+            blink();
+        }.bind(this), this.blinkInterval);
+
+        blink();
     };
 
     this.getPixelPosition = function(position, onScreen) {
-        if (!this.config || !this.session) {
-            return {
-                left : 0,
-                top : 0
-            };
-        }
+        if (!this.config || !this.session)
+            return {left : 0, top : 0};
 
         if (!position)
             position = this.session.selection.getCursor();
@@ -132,72 +158,58 @@ var Cursor = function(parentEl) {
         var cursorTop = (pos.row - (onScreen ? this.config.firstRowScreen : 0)) *
             this.config.lineHeight;
 
-        return {
-            left : cursorLeft,
-            top : cursorTop
-        };
+        return {left : cursorLeft, top : cursorTop};
     };
 
     this.update = function(config) {
         this.config = config;
 
-        if (this.session.selectionMarkerCount > 0) {
-            var selections = this.session.$selectionMarkers;
-            var i = 0, sel, cursorIndex = 0;
+        var selections = this.session.$selectionMarkers;
+        var i = 0, cursorIndex = 0;
 
-            for (var i = selections.length; i--; ) {
-                sel = selections[i];
-                var pixelPos = this.getPixelPosition(sel.cursor, true);
-                if ((pixelPos.top > config.height + config.offset || 
-                     pixelPos.top < -config.offset) && i > 1) {
-                    continue;
-                }
+        if (selections === undefined || selections.length === 0){
+            selections = [{cursor: null}];
+        }
 
-                var style = (this.cursors[cursorIndex++] || this.addCursor()).style;
-
-                style.left = pixelPos.left + "px";
-                style.top = pixelPos.top + "px";
-                style.width = config.characterWidth + "px";
-                style.height = config.lineHeight + "px";
+        for (var i = selections.length; i--; ) {
+            var pixelPos = this.getPixelPosition(selections[i].cursor, true);
+            if ((pixelPos.top > config.height + config.offset ||
+                 pixelPos.top < -config.offset) && i > 1) {
+                continue;
             }
-            if (cursorIndex > 1)
-                while (this.cursors.length > cursorIndex)
-                    this.removeCursor();
-        } else {
-            var pixelPos = this.getPixelPosition(null, true);
-            var style = this.cursor.style;
+
+            var style = (this.cursors[cursorIndex++] || this.addCursor()).style;
+
             style.left = pixelPos.left + "px";
             style.top = pixelPos.top + "px";
             style.width = config.characterWidth + "px";
             style.height = config.lineHeight + "px";
-
-            while (this.cursors.length > 1)
-                this.removeCursor();
         }
+        while (this.cursors.length > cursorIndex)
+            this.removeCursor();
 
         var overwrite = this.session.getOverwrite();
-        if (overwrite != this.overwrite)
-            this.$setOverwrite(overwrite);
+        this.$setOverwrite(overwrite);
 
         // cache for textarea and gutter highlight
         this.$pixelPos = pixelPos;
-
         this.restartTimer();
     };
 
     this.$setOverwrite = function(overwrite) {
-        this.overwrite = overwrite;
-        for (var i = this.cursors.length; i--; ) {
+        if (overwrite != this.overwrite) {
+            this.overwrite = overwrite;
             if (overwrite)
-                dom.addCssClass(this.cursors[i], "ace_overwrite");
+                dom.addCssClass(this.element, "ace_overwrite-cursors");
             else
-                dom.removeCssClass(this.cursors[i], "ace_overwrite");
+                dom.removeCssClass(this.element, "ace_overwrite-cursors");
         }
     };
 
     this.destroy = function() {
-        clearInterval(this.blinkId);
-    }
+        clearInterval(this.intervalId);
+        clearTimeout(this.timeoutId);
+    };
 
 }).call(Cursor.prototype);
 
diff --git a/lib/ace/theme/ambiance.css b/lib/ace/theme/ambiance.css
index 65a25bbd..524ad03a 100644
--- a/lib/ace/theme/ambiance.css
+++ b/lib/ace/theme/ambiance.css
@@ -66,7 +66,7 @@
   border-left: 1px solid #7991E8;
 }
 
-.ace-ambiance .ace_cursor.ace_overwrite {
+.ace-ambiance .ace_overwrite-cursors .ace_cursor {
   border: 1px solid #FFE300;
   background: #766B13;
 }
diff --git a/lib/ace/theme/chrome.css b/lib/ace/theme/chrome.css
index 8e166a90..773c213c 100644
--- a/lib/ace/theme/chrome.css
+++ b/lib/ace/theme/chrome.css
@@ -17,7 +17,7 @@
   border-left: 2px solid black;
 }
 
-.ace-chrome .ace_cursor.ace_overwrite {
+.ace-chrome .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid black;
 }
diff --git a/lib/ace/theme/clouds.css b/lib/ace/theme/clouds.css
index 1f64a7cd..4ff7e7c2 100644
--- a/lib/ace/theme/clouds.css
+++ b/lib/ace/theme/clouds.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #000000
 }
 
-.ace-clouds .ace_cursor.ace_overwrite {
+.ace-clouds .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #000000
 }
diff --git a/lib/ace/theme/clouds_midnight.css b/lib/ace/theme/clouds_midnight.css
index 632dc4e5..6bc319d1 100644
--- a/lib/ace/theme/clouds_midnight.css
+++ b/lib/ace/theme/clouds_midnight.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #7DA5DC
 }
 
-.ace-clouds-midnight .ace_cursor.ace_overwrite {
+.ace-clouds-midnight .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #7DA5DC
 }
diff --git a/lib/ace/theme/cobalt.css b/lib/ace/theme/cobalt.css
index 3c8d61f9..3717ba64 100644
--- a/lib/ace/theme/cobalt.css
+++ b/lib/ace/theme/cobalt.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #FFFFFF
 }
 
-.ace-cobalt .ace_cursor.ace_overwrite {
+.ace-cobalt .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FFFFFF
 }
diff --git a/lib/ace/theme/crimson_editor.css b/lib/ace/theme/crimson_editor.css
index f8032fa4..2d4a0eef 100644
--- a/lib/ace/theme/crimson_editor.css
+++ b/lib/ace/theme/crimson_editor.css
@@ -26,7 +26,7 @@
   border-left: 2px solid black;
 }
 
-.ace-crimson-editor .ace_cursor.ace_overwrite {
+.ace-crimson-editor .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid black;
 }
diff --git a/lib/ace/theme/dawn.css b/lib/ace/theme/dawn.css
index fcfd5e89..ca544fea 100644
--- a/lib/ace/theme/dawn.css
+++ b/lib/ace/theme/dawn.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #000000
 }
 
-.ace-dawn .ace_cursor.ace_overwrite {
+.ace-dawn .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #000000
 }
diff --git a/lib/ace/theme/dreamweaver.css b/lib/ace/theme/dreamweaver.css
index 04983385..30f77cbf 100644
--- a/lib/ace/theme/dreamweaver.css
+++ b/lib/ace/theme/dreamweaver.css
@@ -23,7 +23,7 @@
   border-left: 2px solid black;
 }
 
-.ace-dreamweaver .ace_cursor.ace_overwrite {
+.ace-dreamweaver .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid black;
 }
diff --git a/lib/ace/theme/github.css b/lib/ace/theme/github.css
index 12ffa256..5b059727 100644
--- a/lib/ace/theme/github.css
+++ b/lib/ace/theme/github.css
@@ -70,7 +70,7 @@
   border-left: 2px solid black;
 }
 
-.ace-github .ace_cursor.ace_overwrite {
+.ace-github .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid black;
 }
diff --git a/lib/ace/theme/idle_fingers.css b/lib/ace/theme/idle_fingers.css
index 1b735dff..43eff698 100644
--- a/lib/ace/theme/idle_fingers.css
+++ b/lib/ace/theme/idle_fingers.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #91FF00
 }
 
-.ace-idle-fingers .ace_cursor.ace_overwrite {
+.ace-idle-fingers .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #91FF00
 }
diff --git a/lib/ace/theme/kr_theme.css b/lib/ace/theme/kr_theme.css
index ffefb03a..0f42c384 100644
--- a/lib/ace/theme/kr_theme.css
+++ b/lib/ace/theme/kr_theme.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #FF9900
 }
 
-.ace-kr-theme .ace_cursor.ace_overwrite {
+.ace-kr-theme .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FF9900
 }
diff --git a/lib/ace/theme/merbivore.css b/lib/ace/theme/merbivore.css
index a842b716..69e81376 100644
--- a/lib/ace/theme/merbivore.css
+++ b/lib/ace/theme/merbivore.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #FFFFFF
 }
 
-.ace-merbivore .ace_cursor.ace_overwrite {
+.ace-merbivore .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FFFFFF
 }
diff --git a/lib/ace/theme/merbivore_soft.css b/lib/ace/theme/merbivore_soft.css
index 7e276a89..ddd417f8 100644
--- a/lib/ace/theme/merbivore_soft.css
+++ b/lib/ace/theme/merbivore_soft.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #FFFFFF
 }
 
-.ace-merbivore-soft .ace_cursor.ace_overwrite {
+.ace-merbivore-soft .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FFFFFF
 }
diff --git a/lib/ace/theme/mono_industrial.css b/lib/ace/theme/mono_industrial.css
index b5eb68b2..f9a318fc 100644
--- a/lib/ace/theme/mono_industrial.css
+++ b/lib/ace/theme/mono_industrial.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #FFFFFF
 }
 
-.ace-mono-industrial .ace_cursor.ace_overwrite {
+.ace-mono-industrial .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FFFFFF
 }
@@ -135,4 +135,4 @@
 
 .ace-mono-industrial .ace_indent-guide {
   background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAACCAYAAACZgbYnAAAAEklEQVQImWNQ0tH4zzBz5sz/ABAOBECKH+evAAAAAElFTkSuQmCC) right repeat-y
-}
\ No newline at end of file
+}
diff --git a/lib/ace/theme/monokai.css b/lib/ace/theme/monokai.css
index 1a34fed4..ed876c79 100644
--- a/lib/ace/theme/monokai.css
+++ b/lib/ace/theme/monokai.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #F8F8F0
 }
 
-.ace-monokai .ace_cursor.ace_overwrite {
+.ace-monokai .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #F8F8F0
 }
diff --git a/lib/ace/theme/pastel_on_dark.css b/lib/ace/theme/pastel_on_dark.css
index 18f61d85..b517f22a 100644
--- a/lib/ace/theme/pastel_on_dark.css
+++ b/lib/ace/theme/pastel_on_dark.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #A7A7A7
 }
 
-.ace-pastel-on-dark .ace_cursor.ace_overwrite {
+.ace-pastel-on-dark .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #A7A7A7
 }
diff --git a/lib/ace/theme/solarized_dark.css b/lib/ace/theme/solarized_dark.css
index 26b206b0..4d47fb76 100644
--- a/lib/ace/theme/solarized_dark.css
+++ b/lib/ace/theme/solarized_dark.css
@@ -22,7 +22,7 @@
   border-left: 2px solid #D30102
 }
 
-.ace-solarized-dark .ace_cursor.ace_overwrite {
+.ace-solarized-dark .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #D30102
 }
diff --git a/lib/ace/theme/solarized_light.css b/lib/ace/theme/solarized_light.css
index e00b9b39..65dfe8df 100644
--- a/lib/ace/theme/solarized_light.css
+++ b/lib/ace/theme/solarized_light.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #000000
 }
 
-.ace-solarized-light .ace_cursor.ace_overwrite {
+.ace-solarized-light .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #000000
 }
diff --git a/lib/ace/theme/textmate.css b/lib/ace/theme/textmate.css
index ef0be415..538700f2 100644
--- a/lib/ace/theme/textmate.css
+++ b/lib/ace/theme/textmate.css
@@ -20,7 +20,7 @@
   border-left: 2px solid black;
 }
 
-.ace-tm .ace_cursor.ace_overwrite {
+.ace-tm .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid black;
 }
diff --git a/lib/ace/theme/tomorrow.css b/lib/ace/theme/tomorrow.css
index 90c397bf..a5d88b6c 100644
--- a/lib/ace/theme/tomorrow.css
+++ b/lib/ace/theme/tomorrow.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #AEAFAD
 }
 
-.ace-tomorrow .ace_cursor.ace_overwrite {
+.ace-tomorrow .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #AEAFAD
 }
diff --git a/lib/ace/theme/tomorrow_night.css b/lib/ace/theme/tomorrow_night.css
index 8a62bac2..0baaf323 100644
--- a/lib/ace/theme/tomorrow_night.css
+++ b/lib/ace/theme/tomorrow_night.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #AEAFAD
 }
 
-.ace-tomorrow-night .ace_cursor.ace_overwrite {
+.ace-tomorrow-night .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #AEAFAD
 }
diff --git a/lib/ace/theme/tomorrow_night_blue.css b/lib/ace/theme/tomorrow_night_blue.css
index ca0a84fe..daebddb1 100644
--- a/lib/ace/theme/tomorrow_night_blue.css
+++ b/lib/ace/theme/tomorrow_night_blue.css
@@ -21,7 +21,7 @@
   border-left: 2px solid #FFFFFF
 }
 
-.ace-tomorrow-night-blue .ace_cursor.ace_overwrite {
+.ace-tomorrow-night-blue .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FFFFFF
 }
diff --git a/lib/ace/theme/tomorrow_night_bright.css b/lib/ace/theme/tomorrow_night_bright.css
index 24f4469c..065e2f00 100644
--- a/lib/ace/theme/tomorrow_night_bright.css
+++ b/lib/ace/theme/tomorrow_night_bright.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #9F9F9F
 }
 
-.ace-tomorrow-night-bright .ace_cursor.ace_overwrite {
+.ace-tomorrow-night-bright .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #9F9F9F
 }
diff --git a/lib/ace/theme/tomorrow_night_eighties.css b/lib/ace/theme/tomorrow_night_eighties.css
index c1695b0d..5584d62d 100644
--- a/lib/ace/theme/tomorrow_night_eighties.css
+++ b/lib/ace/theme/tomorrow_night_eighties.css
@@ -21,7 +21,7 @@
   border-left: 2px solid #CCCCCC
 }
 
-.ace-tomorrow-night-eighties .ace_cursor.ace_overwrite {
+.ace-tomorrow-night-eighties .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #CCCCCC
 }
diff --git a/lib/ace/theme/twilight.css b/lib/ace/theme/twilight.css
index 3051a3e6..3ef9de2e 100644
--- a/lib/ace/theme/twilight.css
+++ b/lib/ace/theme/twilight.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #A7A7A7
 }
 
-.ace-twilight .ace_cursor.ace_overwrite {
+.ace-twilight .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #A7A7A7
 }
diff --git a/lib/ace/theme/vibrant_ink.css b/lib/ace/theme/vibrant_ink.css
index fdd965f1..c611681d 100644
--- a/lib/ace/theme/vibrant_ink.css
+++ b/lib/ace/theme/vibrant_ink.css
@@ -20,7 +20,7 @@
   border-left: 2px solid #FFFFFF
 }
 
-.ace-vibrant-ink .ace_cursor.ace_overwrite {
+.ace-vibrant-ink .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #FFFFFF
 }
diff --git a/lib/ace/theme/xcode.css b/lib/ace/theme/xcode.css
index 16db2006..463703b0 100644
--- a/lib/ace/theme/xcode.css
+++ b/lib/ace/theme/xcode.css
@@ -22,7 +22,7 @@
   border-left: 2px solid #000000
 }
 
-.ace-xcode .ace_cursor.ace_overwrite {
+.ace-xcode .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid #000000
 }
diff --git a/tool/Theme.tmpl.css b/tool/Theme.tmpl.css
index 3b83c5ba..180132f2 100644
--- a/tool/Theme.tmpl.css
+++ b/tool/Theme.tmpl.css
@@ -22,7 +22,7 @@
   border-left: 2px solid %cursor%;
 }
 
-.%cssClass% .ace_cursor.ace_overwrite {
+.%cssClass% .ace_overwrite-cursors .ace_cursor {
   border-left: 0px;
   border-bottom: 1px solid %overwrite%;
 }