[Dovecot] busy loop?

I just noticed that about 25% of our servers have imap processes hanging:

97996 xxxxxx 1 101 0 4096K 2052K CPU3 2 180:54 98.93% imap

All with 98-100% cpu load, taking up 1 or more CPUs.

dovecot 1.1.2, FreeBSD 6.2. is this caused by the deadlock issue thats fixed in 1.1.4?

Cor