Hi,

I think I'm in the same position. I have four user accounts and after updating to Firefox 4.0 I started it  up in my main

account but not the others.

After configuring FF 4 to my liking (in this one account only) I applied the hotfix and everything appears to be working

but the other accounts in which I did not start FF 4 prior to the hotfix do not work - I get the "Not compatile with FF 4"

message.

Any (simple, easy) solutions out there? I'd prefer not to have to unistall and reinstall anything.

Thanks,

Phillip