diff --git a/IPython/html/static/notebook/js/codecell.js b/IPython/html/static/notebook/js/codecell.js
index 05f688a..73228e8 100644
--- a/IPython/html/static/notebook/js/codecell.js
+++ b/IPython/html/static/notebook/js/codecell.js
@@ -230,7 +230,7 @@ define([
             event.preventDefault();
             return true;
         } else if (event.keyCode === keycodes.tab && event.type === 'keydown' && event.shiftKey) {
-                if (editor.somethingSelected()){
+                if (editor.somethingSelected() || editor.getSelections().length !== 1){
                     var anchor = editor.getCursor("anchor");
                     var head = editor.getCursor("head");
                     if( anchor.line != head.line){
@@ -244,7 +244,9 @@ define([
         } else if (event.keyCode === keycodes.tab && event.type == 'keydown') {
             // Tab completion.
             this.tooltip.remove_and_cancel_tooltip();
-            if (editor.somethingSelected()) {
+
+            // completion does not work on multicursor, it might be possible though in some cases
+            if (editor.somethingSelected() || editor.getSelections().length > 1) {
                 return false;
             }
             var pre_cursor = editor.getRange({line:cur.line,ch:0},cur);
diff --git a/IPython/html/static/notebook/js/completer.js b/IPython/html/static/notebook/js/completer.js
index 97fc0cf..2fde0c1 100644
--- a/IPython/html/static/notebook/js/completer.js
+++ b/IPython/html/static/notebook/js/completer.js
@@ -94,7 +94,7 @@ define([
     Completer.prototype.startCompletion = function () {
         // call for a 'first' completion, that will set the editor and do some
         // special behavior like autopicking if only one completion available.
-        if (this.editor.somethingSelected()) return;
+        if (this.editor.somethingSelected()|| this.editor.getSelections().length > 1) return;
         this.done = false;
         // use to get focus back on opera
         this.carry_on_completion(true);
@@ -143,7 +143,7 @@ define([
         }
 
         // We want a single cursor position.
-        if (this.editor.somethingSelected()) {
+        if (this.editor.somethingSelected()|| editor.getSelections().length > 1) {
             return;
         }
 
diff --git a/IPython/html/static/notebook/js/tooltip.js b/IPython/html/static/notebook/js/tooltip.js
index af63cb1..e370efd 100644
--- a/IPython/html/static/notebook/js/tooltip.js
+++ b/IPython/html/static/notebook/js/tooltip.js
@@ -117,8 +117,7 @@ define([
 
     Tooltip.prototype.showInPager = function (cell) {
         // reexecute last call in pager by appending ? to show back in pager
-        var that = this;
-        this.events.trigger('open_with_text.Pager', that._reply.content);
+        this.events.trigger('open_with_text.Pager', this._reply.content);
         this.remove_and_cancel_tooltip();
     };
 
@@ -208,7 +207,7 @@ define([
         var msg_id = cell.kernel.inspect(text, cursor_pos, callbacks);
     };
 
-    // make an imediate completion request
+    // make an immediate completion request
     Tooltip.prototype.request = function (cell, hide_if_no_docstring) {
         // request(codecell)
         // Deal with extracting the text from the cell and counting
@@ -222,10 +221,11 @@ define([
         this._hide_if_no_docstring = hide_if_no_docstring;
 
         if(editor.somethingSelected()){
+            // get only the most recent selection.
             text = editor.getSelection();
         }
 
-        // need a permanent handel to code_mirror for future auto recall
+        // need a permanent handle to code_mirror for future auto recall
         this.code_mirror = editor;
 
         // now we treat the different number of keypress
@@ -325,7 +325,7 @@ define([
         this.text.scrollTop(0);
     };
 
-    // Backwards compatability.
+    // Backwards compatibility.
     IPython.Tooltip = Tooltip;
 
     return {'Tooltip': Tooltip};