No, this is a result of other changes done last evening :-P
Aleksey, please update the following files with the latest versions from trunk:
forum/common.php
forum/includes/auth/auth_roscms.php
forum/styles/roscms/template/overall_header.html
After that, the Admin Panel should be ok again.
If you don't have time for that now, I'll probably be online this evening to bug you about it ;-)
Best regards,
Colin
Incidentally Colin, did those changes muck up the forum admin panel? Cause I can't seem to get to it.