Further to the kpackagekit story...
A couple of days ago i upgraded kpackagekit to testing with
"yum --enablerepo=updates-testing update kpackagekit". That resulted in
kpackagekit-0.5.3-1.fc12.x86_64 installed on my system.
Since then there has been no upgrades available, at least not in
kpackagekit, but today i checked with "yum upgrade" in a shell and sure
enough there were 22 upgrades available! After checking once more with
kpackagekit (still nothing) I downgraded to
kpackagekit-0.5.2-1.fc12.x86_64 and all the upgrades were available there
as well. So I upgraded kpackagekit one more time to check (all updates
gone) and down again (all updates available).
As I see it there must be a regression in kpackagekit-0.5.3-1.fc12.x86_64!
It looks like we are at the same level now. I too downgraded kpackagekit to
version 0.5.2-1 and ... the KDE Daemon didn't crash. Available updates are
visible. The crashes didn't happen anymore, after I got the following updates:
Jan 16 11:26:49 Updated: libxcb-1.5-1.fc12.x86_64
Jan 16 11:26:51 Updated: system-config-printer-libs-1.1.16-8.fc12.x86_64
Jan 16 11:26:53 Updated: libxfcegui4-4.6.2-1.fc12.x86_64
Jan 16 11:26:54 Updated: system-config-printer-udev-1.1.16-8.fc12.x86_64
Jan 16 11:26:56 Updated: gdb-7.0.1-26.fc12.x86_64
Jan 16 11:26:57 Updated: 1:xorg-x11-drv-
Jan 16 11:26:58 Updated: libxcb-devel-1.5-1.fc12.x86_64
Jan 16 11:27:00 Updated: system-config-printer-1.1.16-8.fc12.x86_64
Which one is relevant if one? I don't know. May be there is still somewhere a
'red herring'? :-)
BTW: I'll update bug report  with this information.
BTW1, I still have NO chrashes with either version of kpackagekit.
BTW2, there is a dependency problem with mesa-libGL
Fel: Saknat beroende: libdrm >= 2.4.17-1 behövs av paketet mesa-