kmail crashes when removing local folder

Binary package hint: kdepim

When I change something in my IMAP profile it tells me that it doesn't find any folders and that it will create them.
I end up with multiple folders with the same name and when trying to remove them (one or many) kmail crashes.
It doesn't happen every time I try to remove the folders but it has happened twice so it is sort of reproducable.
it's kind of hard to know which information you need but if you'll let me know what you want I'll do my very best to provide it.

Here's the trace of the crash.

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1250208048 (LWP 19364)]
[New Thread -1281045616 (LWP 19401)]
[New Thread -1272652912 (LWP 19400)]
[New Thread -1264260208 (LWP 19371)]
[New Thread -1255867504 (LWP 19370)]
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[KCrash handler]
#6 0xb73a0b63 in QGListIterator::QGListIterator ()
   from /usr/lib/libqt-mt.so.3
#7 0xb7ce0a67 in ?? () from /usr/lib/libkmailprivate.so
#8 0xbfab55b4 in ?? ()
#9 0x00000000 in ?? ()