<telerik:RadEditor ID="RadEditor1" runat="server">
				<Content>
				select and delete some of the "th" content, the entire cell element will be deleted instead of its content
					<table>

						<thead>
							<tr>
								<th>th1</th>
								<th>th2</th>
								<th>th3</th>
							</tr>
						</thead>

						<tr>
							<td>1</td>
							<td>2</td>
							<td>3</td>
						</tr>

					</table>
				</Content>
			</telerik:RadEditor>
			<script>
				//workaraound

				Telerik.Web.UI.Editor.DeleteSelectionCommand.prototype.deleteNodeContent = function (node) {
					var utils = Telerik.Web.UI.Editor.Utils;
					if (utils.isTag(node, "td") || utils.isTag(node, "th")) {
						utils.removeChildren(node);
						node.innerHTML = NBSP;
					} else {
						remove(node);
					}
				}
				
				function remove(node) {
					node.parentNode.removeChild(node);
				}
			</script>