It's not down because of the patch. We found a crash that only happens for certain kinds of messages, made a fix, and hope to have it up again soon once QA signs off on it.
You may be wondering, "If it's beta, why does it need to be QA'd?"
QA almost always checks even the most minor fixes to make sure we didn't do something stupid like make every member of the "kill skuls" forum an admin or something.