[Dovecot] kqueue bug?

[Timo Sirainen]

Apparently Dovecot with kqueue ioloop enabled causes random crashes in FreeBSD 
9.1. Anyone else noticed something like that? I'm wondering if Dovecot's kqueue 
code has a bug somewhere (I can't find it) or could it be that FreeBSD itself 
has a bug? Anyway it seems to be returning events for filters that have already 
been removed.