Installing the last kwin-package that was in testing solves the problem, too. The package is lokated at:
http://snapshot.debian.net/archive/2009/03/28/debian/pool/main/k/kdebase/kwin_3.5.10.dfsg.1-2_i386.deb -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org