Bug in ISPConfig/UebiMiau?

[EvdM]

Dear all -

I have a particular problem with one specific account. If this user tries to log in to UebiMiau, he receives an error message at the top of the browser:

Warning: reset() [function.reset]:
Passed variable is not an array or object in
/home/admispconfig/ispconfig/web/webmail/msglist.php on line 180

The inbox shown conains only one message with:

From: [No subject]
Subject: [No subject]
Date: the login date and time
Size: 0Kb

This message cannot be deleted.
The actual inbox of this user does contain the regular mail.

Since this occurred, I have upgraded ISPConfig to 2.2.6 (from 2.2.4) and also upgraded UebiMiau to the 05/18/2006 release. This did not help at all.

All other accounts seem to be fine and I am pretty much clue-less where else to look. So any suggestion would be much appreciated. Thanks!

Erik