Adam,
Various buttons are calling the tag.aspx page and all are demonstrating the same problem with the throw; command.
To see this problem:
1. Download Cassini Web Server from Microsoft and run it, pointing to any folder on your computer that has CE installed
(for example, we have a folder named C:\Inetpub\wwwroot\Cute_Editor_V6 that has bin, CuteSoft_Client, web.config, default.aspx - which has a CE on it... etc.)
2. Click [Start] on Cassini to go to that folder.
3. Select the applicable .aspx to bring up the page with CE on it.
4. Add a table to CE then right-click and select Table Properties.
When the Properties dialog displays, the inner frame will display the error.
FredD