Thanks for your bug report.
Is this still happening in Ubuntu/Kubuntu 11.04?
Regards Jonathan
** Changed in: kdepim (Ubuntu)
Status: New = Incomplete
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** Description changed:
Kmail floods .xsession-errors in an epic manner.
This is important - because I can not debug other X related errors
therefore!
Ubuntu 9.04 amd64
https://bugs.launchpad.net/ubuntu/+source/kdepim/+bug/418649
+
+ ii kmail