diff --git a/lib/ice-coder.js b/lib/ice-coder.js
index e24d625..b152318 100644
--- a/lib/ice-coder.js
+++ b/lib/ice-coder.js
@@ -1011,11 +1011,17 @@ var ICEcoder = {
 
 	// Alter array indicating which files have changed
 	redoChangedContent: function(evt) {
-		var cM;
+		var cM, key;
 		
 		cM = ICEcoder.getcMInstance();
-		ICEcoder.changedContent[ICEcoder.selectedTab-1] = cM.historySize().undo > 0 ? 1 : 0;
-		ICEcoder.redoTabHighlight(ICEcoder.selectedTab);
+		key = evt.keyCode ? evt.keyCode : evt.which ? evt.which : evt.charCode;
+		// Exclude a few keys...
+		// Escape (27), Caps Lock (20), Shift, CTRL, Alt, Pause/Break (16-19), Left, Up, Right, Down (37-40), Num Lock, Scroll Lock (144-145), 
+		// Insert, Delete (45,46), Page Up, Page Down, End, Home (33-36), Left Win Key, Right Win Key (91-92), F1-F12 (112-123)
+		if (key!=27 && key!=20 && (key<16||key>19) && (key<37||key>40) && (key!=144||key!=145) && (key!=45||key!=46) && (key<33||key>36) && (key!=91||key!=92) && (key<112||key>123)) {
+			ICEcoder.changedContent[ICEcoder.selectedTab-1] = cM.historySize().undo > 0 ? 1 : 0;
+			ICEcoder.redoTabHighlight(ICEcoder.selectedTab);
+		}
 	},
 
 	// Show & hide target element