I'm getting something similar on my DNN 4 installation in a custom module. The editor looks and works fine in other modules, but when creating a single settings.aspx page with only the CE on it (following DNN's user control registration and code conventions) I get something that looks like this.
Here is my aspx code used to reder the control:
<%@ Register TagPrefix="dnn" TagName="TextEditor" Src="~/controls/TextEditor.ascx"%>
<%@ Control Language="vb" AutoEventWireup="false" CodeFile="Settings.ascx.vb" Inherits="MyRVAdvantage.Modules.DealerInventoryDetail.Settings" %>
<table>
<tr>
<td><dnn:TextEditor id="txtDescription" runat="server" width="100%" height="250"></dnn:TextEditor></td>
</tr>
</table>
I also get a script error on pageload as follows:
Line: 976
Char: 182
Error: Syntax Error
Code: 0
I literally copied this code from another module (core storefront) which renders the editor perfectly. There is no code behind on this page (yet). I'm running the latest download of CE on DNN 4.0.2 on Advanced Server, Running ASP.Net 2.0 and I use VS2005 for development.
Any suggestions on what to do?