Before you use it, you really should make a back up. Once you protect a map you can not open it back up again; unless you deprotect it, in which case the triggers will be in one huge JASS script. Anyway, good luck.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.