diff --git a/lib/ace/layer/text.js b/lib/ace/layer/text.js
index 812dd066..a54f9250 100644
--- a/lib/ace/layer/text.js
+++ b/lib/ace/layer/text.js
@@ -223,23 +223,25 @@ var Text = function(parentEl) {
             if (this.showInvisibles) {
                 tabStr.push("<span class='ace_invisible'>"
                     + this.TAB_CHAR
-                    + Array(i).join("&#160;")
+                    + lang.stringRepeat("\xa0", i - 1)
                     + "</span>");
             } else {
-                tabStr.push(new Array(i+1).join("&#160;"));
+                tabStr.push(lang.stringRepeat("\xa0", i));
             }
         }
         if (this.displayIndentGuides) {
             this.$indentGuideRe =  /\s\S| \t|\t |\s$/;
             var className = "ace_indent-guide";
-            var content = Array(this.tabSize + 1).join("&#160;");
-            var tabContent = content;
             if (this.showInvisibles) {
                 className += " ace_invisible";
-                tabContent = this.TAB_CHAR + content.substr(6);
+                var spaceContent = lang.stringRepeat(this.SPACE_CHAR, this.tabSize);
+                var tabContent = this.TAB_CHAR + lang.stringRepeat("\xa0", this.tabSize - 1);
+            } else{
+                var spaceContent = lang.stringRepeat("\xa0", this.tabSize);
+                var tabContent = spaceContent;
             }
 
-            this.$tabStrings[" "] = "<span class='" + className + "'>" + content + "</span>";
+            this.$tabStrings[" "] = "<span class='" + className + "'>" + spaceContent + "</span>";
             this.$tabStrings["\t"] = "<span class='" + className + "'>" + tabContent + "</span>";
         }
     };
@@ -411,7 +413,9 @@ var Text = function(parentEl) {
         var replaceReg = /\t|&|<|( +)|([\x00-\x1f\x80-\xa0\u1680\u180E\u2000-\u200f\u2028\u2029\u202F\u205F\u3000\uFEFF])|[\u1100-\u115F\u11A3-\u11A7\u11FA-\u11FF\u2329-\u232A\u2E80-\u2E99\u2E9B-\u2EF3\u2F00-\u2FD5\u2FF0-\u2FFB\u3000-\u303E\u3041-\u3096\u3099-\u30FF\u3105-\u312D\u3131-\u318E\u3190-\u31BA\u31C0-\u31E3\u31F0-\u321E\u3220-\u3247\u3250-\u32FE\u3300-\u4DBF\u4E00-\uA48C\uA490-\uA4C6\uA960-\uA97C\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFAFF\uFE10-\uFE19\uFE30-\uFE52\uFE54-\uFE66\uFE68-\uFE6B\uFF01-\uFF60\uFFE0-\uFFE6]/g;
         var replaceFunc = function(c, a, b, tabIdx, idx4) {
             if (a) {
-                return new Array(c.length+1).join("&#160;");
+                return self.showInvisibles ?
+                    "<span class='ace_invisible'>" + lang.stringRepeat(self.SPACE_CHAR, c.length) + "</span>" :
+                    lang.stringRepeat("\xa0", c.length);
             } else if (c == "&") {
                 return "&#38;";
             } else if (c == "<") {
@@ -459,10 +463,10 @@ var Text = function(parentEl) {
             return value;
         if (value[0] == " ") {
             cols -= cols % this.tabSize;
-            stringBuilder.push(Array(cols/this.tabSize + 1).join(this.$tabStrings[" "]));
+            stringBuilder.push(lang.stringRepeat(this.$tabStrings[" "], cols/this.tabSize));
             return value.substr(cols);
         } else if (value[0] == "\t") {
-            stringBuilder.push(Array(cols + 1).join(this.$tabStrings["\t"]));
+            stringBuilder.push(lang.stringRepeat(this.$tabStrings["\t"], cols));
             return value.substr(cols);
         }
         return value;
diff --git a/lib/ace/lib/lang.js b/lib/ace/lib/lang.js
index 4f81c842..4e6ebf2c 100644
--- a/lib/ace/lib/lang.js
+++ b/lib/ace/lib/lang.js
@@ -36,7 +36,15 @@ exports.stringReverse = function(string) {
 };
 
 exports.stringRepeat = function (string, count) {
-     return new Array(count + 1).join(string);
+    var result = '';
+    while (count > 0) {
+        if (count & 1)
+            result += string;
+
+        if (count >>= 1)
+            string += string;
+    }
+    return result;
 };
 
 var trimBeginRegexp = /^\s\s*/;
diff --git a/lib/ace/multi_select.js b/lib/ace/multi_select.js
index 4de4d446..469052c1 100644
--- a/lib/ace/multi_select.js
+++ b/lib/ace/multi_select.js
@@ -780,23 +780,23 @@ var Editor = require("./editor").Editor;
             return m;
         }).map(isLeftAligned ? isRightAligned ? alignRight : alignLeft : unAlign);
 
-        function strRepeat(n, ch) {
-            return Array(n + 1).join(ch)
+        function spaces(n) {
+            return lang.stringRepeat(" ", n);
         }
 
         function alignLeft(m) {
-            return !m[2] ? m[0] : strRepeat(startW, " ") + m[2]
-                + strRepeat(textW - m[2].length + endW, " ")
+            return !m[2] ? m[0] : spaces(startW) + m[2]
+                + spaces(textW - m[2].length + endW)
                 + m[4].replace(/^([=:])\s+/, "$1 ")
         }
         function alignRight(m) {
-            return !m[2] ? m[0] : strRepeat(startW + textW - m[2].length, " ") + m[2]
-                + strRepeat(endW, " ")
+            return !m[2] ? m[0] : spaces(startW + textW - m[2].length) + m[2]
+                + spaces(endW, " ")
                 + m[4].replace(/^([=:])\s+/, "$1 ")
         }
         function unAlign(m) {
-            return !m[2] ? m[0] : strRepeat(startW, " ") + m[2]
-                + strRepeat(endW, " ")
+            return !m[2] ? m[0] : spaces(startW) + m[2]
+                + spaces(endW)
                 + m[4].replace(/^([=:])\s+/, "$1 ")
         }
     }