I found an article about IE crashing related to a JScript.dll bug, installed an update here and now it's working fine:
http://www.microsoft.com/technet/security/bulletin/ms06-023.mspx
My JScript.dll version was
5.6.0.8820, and it should be at least
5.6.0.8831
I just wonder how come nobody else has had this problem using CuteEditor? I found the solution at Telerik's forum, it seems to be Ajax related:
http://www.telerik.com/support/kb/article/b454K-tge-b454T-ceh-b454c-ceh.aspx
Thanks -- Bidan