Adam:

redengine,

 

If you can't reproduce this problem in the demo page, can you create a simple aspx file which contains the CuteEditor only and test again?

 

If it works, then add other controls one by one. So it may help us figure out what causes the problem.

 

 

If I leave my browser open on the page that fails and then go to the demo ... I get the same error

Error: uncaught exception: [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsISelection.getRangeAt]"  nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)"  location: "JS frame :: http://cutesoft.net/CuteSoft_Client/CuteEditor/CuteEditor_Gecko.js.aspx?settinghash=f9b53659 :: anonymous :: line 13"  data: no]