Adam, I just tried Demo: http://cutesoft.net/example/EnableStripScriptTags.aspx with Firefox.

When the page loads, I clicked in the text input area and try deleting characters. Still can't.

Strangely, this is not a problem with the CuteEditor for ASP demo page:
http://cutesoft.net/asp/EnableAll.asp

I use the for .NET version, not the for ASP version. Any comments? Thanks!