The NewLine command behave inconsistently across browsers and causes different incorrect content generation in IE, Chrome and Safari.

 - In IE - New lines are added, but the cursor stays in the initial/first line. This issue also causes an performance problems when typing and pressing Enter with regular speed.

 - In Chrome - Pressing Enter causes mixed content of tracked and not-tracked text to appear without toggling the state of the Track Changes. Also, adds an empty INS tag in from of the new line.

 - In Safari - Adds an empty INS tag in from of the new line.


For the time being you can incorporate the JavaScript code from the following example:

<telerik:RadEditor runat="server" ID="RadEditor1" EnableTrackChanges="true">
	<Tools>
		<telerik:EditorToolGroup>
			<telerik:EditorTool name="AcceptTrackChange" text="Accept Track Change" />
			<telerik:EditorTool name="RejectTrackChange" text="Reject Track Change" />
			<telerik:EditorTool name="AcceptAllTrackChanges" text="Accept All Track Changes" />
			<telerik:EditorTool name="RejectAllTrackChanges" text="Reject All Track Changes" />
			<telerik:EditorTool name="EnableTrackChangesOverride" text="Enable Track Changes Override" />
		</telerik:EditorToolGroup>
	</Tools>
</telerik:RadEditor>

<script type="text/javascript">
	(function () {
		var $E = Telerik.Web.UI.Editor;
		var utils = $E.Utils;
		var isTypingKey = utils.isTypingKey;
		utils.isTypingKey = function (e) {
			return e.keyCode != 13 && isTypingKey(e);
		}

		var extractFrom = $E.InsertParagraphCommand.prototype.extractFrom;
		$E.InsertParagraphCommand.prototype.extractFrom = function (cursor, container) {
			var newElement = extractFrom.call(this, cursor, container);
			if (!this.get_editor().get_enableTrackChanges() || utils.isTextNode(cursor.nextSibling)) return newElement;
			$telerik.$(newElement).find("*").each(function (index, item) {
				if ($E.TrackChangesUtils.isTrackChangeElement(item)) {
					if (utils.isTag(item, "ins") || utils.isTag(item, "del")) {
						utils.removeNode(item);
						return;
					}
					$E.TrackChangesUtils.removeNodeTracking(item);
				}
			});
			return newElement;
		}
	}());
</script>