Hehe one hopes
...
I did a bunch of research on the module, it is really quite nice, but the rules themselves can toatally trash some scripts, not to mention leave the admin's of the sites going "what the hell?" when they're trying for legit use...
If you have access to your error logs you should be able to find it, in a section 509 error code i think; it's been a while since i've played with it.