Hello! The kontact-program (part of kde-pim) sometime crashes if certain actions are taken. For example try to change the appeance of kmail in the "configure Kmail ... " dialog.
A trace from the KDE-crashmanager can be found here: http://metawire.org/~leopold/packagestuff/kontact.dump.gz This is a i386-snapshot from August 23 with packages from August 20. All in all KDE and Qt seem to get along well with the malloc(3)-changes here. Alf
