diff --git a/doc/Editor.mm b/doc/Editor.mm
index 57208079..ebcd7a5f 100644
--- a/doc/Editor.mm
+++ b/doc/Editor.mm
@@ -40,7 +40,7 @@
 <node CREATED="1271052825952" ID="Freemind_Link_622561431" MODIFIED="1271052828013" TEXT="qooxdoo"/>
 <node CREATED="1271052830859" ID="Freemind_Link_18779066" MODIFIED="1271052833496" TEXT="APF!"/>
 </node>
-<node CREATED="1271052839079" ID="Freemind_Link_439583810" MODIFIED="1271052852530" TEXT="Options">
+<node CREATED="1271052839079" FOLDED="true" ID="Freemind_Link_439583810" MODIFIED="1271052852530" TEXT="Options">
 <node CREATED="1271052853166" ID="Freemind_Link_629899491" MODIFIED="1271052860101" TEXT="Tabs to spaces"/>
 <node CREATED="1271052862867" ID="Freemind_Link_746641062" MODIFIED="1271052866129" TEXT="Spaces to tabs"/>
 <node CREATED="1271052866517" ID="Freemind_Link_192666733" MODIFIED="1271052869210" TEXT="tab width"/>
@@ -50,8 +50,13 @@
 <node CREATED="1271052900934" ID="Freemind_Link_62594174" MODIFIED="1271052907981" TEXT="comment block"/>
 </node>
 </node>
+<node CREATED="1295094741432" ID="Freemind_Link_1547780849" MODIFIED="1295094754462" TEXT="shadow doc synced in web worker">
+<node CREATED="1295094757135" ID="Freemind_Link_1288894358" MODIFIED="1295094769539" TEXT="do computation intensive stuff in a worker"/>
+<node CREATED="1295094772327" ID="Freemind_Link_294024951" MODIFIED="1295094784554" TEXT="all operation &gt;= O(n)"/>
+<node CREATED="1295265748917" ID="Freemind_Link_730092876" MODIFIED="1295265754848" TEXT="jslint in worker"/>
 </node>
-<node CREATED="1271061753644" ID="Freemind_Link_1898747747" MODIFIED="1271061761714" POSITION="left" TEXT="Competition">
+</node>
+<node CREATED="1271061753644" FOLDED="true" ID="Freemind_Link_1898747747" MODIFIED="1271061761714" POSITION="left" TEXT="Competition">
 <node CREATED="1271061762151" ID="Freemind_Link_248244633" MODIFIED="1271061764275" TEXT="bespin"/>
 <node CREATED="1271061764616" ID="Freemind_Link_1186004994" MODIFIED="1271061768509" TEXT="codeMirror"/>
 <node CREATED="1271061780744" ID="Freemind_Link_457888774" LINK="http://www.cdolivet.com/index.php?page=editArea" MODIFIED="1271061808808" TEXT="editarea"/>
diff --git a/lib/ace/css/editor.css b/lib/ace/css/editor.css
index dc7db9db..cd537ddd 100644
--- a/lib/ace/css/editor.css
+++ b/lib/ace/css/editor.css
@@ -32,7 +32,7 @@
   left: 0px;
 }
 
-.ace_editor .ace_printMargin {
+.ace_editor .ace_print_margin {
   position: absolute;
   height: 100%;
 }
diff --git a/lib/ace/renderloop.js b/lib/ace/renderloop.js
index 5ca491b5..95a6b2c4 100644
--- a/lib/ace/renderloop.js
+++ b/lib/ace/renderloop.js
@@ -71,7 +71,7 @@ var RenderLoop = function(onRender) {
             if (!this.attached) {
                 var _self = this;
                 event.addListener(window, "message", function(e) {
-                    if (e.source == window && _self.callback && e.data == _self.messageName) {
+                    if (_self.callback && e.data == _self.messageName) {
                         event.stopPropagation(e);
                         _self.callback();
                     }
diff --git a/lib/ace/theme/clouds.js b/lib/ace/theme/clouds.js
index 47931808..95b1d94a 100644
--- a/lib/ace/theme/clouds.js
+++ b/lib/ace/theme/clouds.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-clouds .ace_editor .ace_printMargin {\
+.ace-clouds .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/clouds_mignight.js b/lib/ace/theme/clouds_midnight.js
similarity index 98%
rename from lib/ace/theme/clouds_mignight.js
rename to lib/ace/theme/clouds_midnight.js
index 1df4f0b3..21939ae5 100644
--- a/lib/ace/theme/clouds_mignight.js
+++ b/lib/ace/theme/clouds_midnight.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-clouds-midnight .ace_editor .ace_printMargin {\
+.ace-clouds-midnight .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/cobalt.js b/lib/ace/theme/cobalt.js
index cfc6d134..52b8af53 100644
--- a/lib/ace/theme/cobalt.js
+++ b/lib/ace/theme/cobalt.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-cobalt .ace_editor .ace_printMargin {\
+.ace-cobalt .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/dawn.js b/lib/ace/theme/dawn.js
index 203c556f..36b468de 100644
--- a/lib/ace/theme/dawn.js
+++ b/lib/ace/theme/dawn.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-dawn .ace_editor .ace_printMargin {\
+.ace-dawn .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/idle_fingers.js b/lib/ace/theme/idle_fingers.js
index 75abf1cd..41fc98fd 100644
--- a/lib/ace/theme/idle_fingers.js
+++ b/lib/ace/theme/idle_fingers.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-idle-fingers .ace_editor .ace_printMargin {\
+.ace-idle-fingers .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/kr_theme.js b/lib/ace/theme/kr_theme.js
index 49675115..a21e9a2a 100644
--- a/lib/ace/theme/kr_theme.js
+++ b/lib/ace/theme/kr_theme.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-kr-theme .ace_editor .ace_printMargin {\
+.ace-kr-theme .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/mono_industrial.js b/lib/ace/theme/mono_industrial.js
index 529514f7..128d7c33 100644
--- a/lib/ace/theme/mono_industrial.js
+++ b/lib/ace/theme/mono_industrial.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-mono-industrial .ace_editor .ace_printMargin {\
+.ace-mono-industrial .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/monokai.js b/lib/ace/theme/monokai.js
index b146f9f9..fe3e9fcb 100644
--- a/lib/ace/theme/monokai.js
+++ b/lib/ace/theme/monokai.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-monokai .ace_editor .ace_printMargin {\
+.ace-monokai .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/pastel_on_dark.js b/lib/ace/theme/pastel_on_dark.js
index 14c31c9f..2c5b49a2 100644
--- a/lib/ace/theme/pastel_on_dark.js
+++ b/lib/ace/theme/pastel_on_dark.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-pastel-on-dark .ace_editor .ace_printMargin {\
+.ace-pastel-on-dark .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/theme/tm.css b/lib/ace/theme/tm.css
index fc12dc9e..0993335c 100644
--- a/lib/ace/theme/tm.css
+++ b/lib/ace/theme/tm.css
@@ -22,7 +22,7 @@
   padding-right: 6px;
 }
 
-.ace-tm .ace_editor .ace_printMargin {
+.ace-tm .ace_print_margin {
   width: 1px;
   background: #e8e8e8;
 }
diff --git a/lib/ace/theme/twilight.js b/lib/ace/theme/twilight.js
index 137d2b47..4d27f963 100644
--- a/lib/ace/theme/twilight.js
+++ b/lib/ace/theme/twilight.js
@@ -63,7 +63,7 @@ define(function(require, exports, module) {
   padding-right: 6px;\
 }\
 \
-.ace-twilight .ace_editor .ace_printMargin {\
+.ace-twilight .ace_print_margin {\
   width: 1px;\
   background: #e8e8e8;\
 }\
diff --git a/lib/ace/virtual_renderer.js b/lib/ace/virtual_renderer.js
index b38bc6fc..45f61c0f 100644
--- a/lib/ace/virtual_renderer.js
+++ b/lib/ace/virtual_renderer.js
@@ -270,8 +270,8 @@ var VirtualRenderer = function(container, theme) {
 
         if (!this.$printMarginEl) {
             this.$printMarginEl = document.createElement("div");
-            this.$printMarginEl.className = "ace_printMargin";
             this.content.insertBefore(this.$printMarginEl, this.$textLayer.element);
+            this.$printMarginEl.className = "ace_print_margin";
         }
 
         var style = this.$printMarginEl.style;
diff --git a/tool/Theme.tmpl.css b/tool/Theme.tmpl.css
index 9d2c5107..ab240e67 100644
--- a/tool/Theme.tmpl.css
+++ b/tool/Theme.tmpl.css
@@ -22,7 +22,7 @@
   padding-right: 6px;
 }
 
-.%cssClass% .ace_editor .ace_printMargin {
+.%cssClass% .ace_print_margin {
   width: 1px;
   background: %printMargin%;
 }