Random plasma crashes

[omni-vi]

Binary package hint: plasma-desktop

While using standard use of my plasma desktop, the desktop crashed causing my plasma desktop to have to
restart. This is EXTREMELY annoying. When I tried to report this bug using DrKonqui, it crashed. Every time. Then I tried to report the bug via apport-bug but that crashed as well several times. Even kmail crashes randomly but I don't know if there is a connection.
Luckily my browser doesn't seem to be affected.

Please look into this, as it makes working with KDE really difficult.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: plasma-desktop 4:4.6.0a-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic-pae 2.6.38-rc6
Uname: Linux 2.6.38-5-generic-pae i686
Architecture: i386
Date: Thu Mar 3 10:27:31 2011
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100630.1)
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: kdebase-workspace
UpgradeStatus: No upgrade log present (probably fresh install)

[omni-vi (catcher)]

Other people have reported this bug as well, but until now it seems to be ubuntu 11.04 specific

https://bugs.kde.org/show_bug.cgi?id=267189

[omni-vi (catcher)]

Other kde-apps like kmail, kleopatra and drkonqui are behaving very unstable as well. The all crash with signal: Segmentation fault.