[Dovecot] permission problems

Hi, ever since i switched a few servers to 1.1RC4 im finding control dirs with the wrong permissions:

80023615 8 drw------- 2 xxxxxxx user 4096 Apr 23 09:46 ./a/an/xxxxxxx/INBOX/.INBOX.Maatschappijen

When dovecot then wants to write a file inside, it gets a permission denied.

Cor