When a user double clicks on the 'spellcheck' button that I have inserted on the toolbar, a JavaScript error appears as follows:

Line: 15
Char: 62
Error: Access is Denied
Code: 0
URL:http://localhost:1223/TestWebSite/CuteSoft_Client/CuteEditor/SpellCheck.aspx?Culture=en-GB&settinghash=b54abe8b&portalid=

Please note that a spellcheck completes without any problems if the button is only clicked once.

Also, I am unable to reproduce the problem on your demo page.

Thanks,
Wayne.