Version: 1.9.7 (using KDE 3.5.7 "release 64.1" , openSUSE ) Compiler: Target: i586-suse-linux OS: Linux (i686) release 2.6.18.8-0.5-default At the moment I can reproduce it. Open kontact switch to my IMAP-Spam dir and remove spam-mail. kontact crashs.. See attachment for debug output.
Created attachment 21382 [details] debug
You have already posted this crash report (bug #127107).