kmail 3.5.6-r1 crashing

[sameat]

Hi,

Without any reason suddenly my working kmail version 3.5.6-r1 started crashing giving following error message

QGArray::at: Absolute index 0 out of range
*** KMail got signal 11 (Crashing)
DCOP aborting (delayed) call from 'anonymous-23679' to 'kmail'
ERROR: Communication problem with kmail, it probably crashed.
KCrash: Application 'kmail' crashing...
Could not find 'drkonqi' executable.
KCrash cannot reach kdeinit, launching directly.
ICE default IO error handler doing an exit(), pid = 23668, errno = 0
DCOP Cleaning up dead connections.
ICE default IO error handler doing an exit(), pid = 23693, errno = 0


Need help to fix it.