Kontact process does not end. If you shutdown system and later reboot Kontact will not start agin until you mannual go in (I use KsysGuard and end process. Then you can restart contact and it application (kmail, contacts, calendar and knode in my case. Always occurs if you logout, restart or power off the system.
Note : Found bug that was closed in 2011 that discribed this failure exactly. did another search to find it and get the number, but I cannot find it.

This was working with KDE 4.12.0. started after update to 4.12.1.

Reproducible: Always

Steps to Reproduce:
1. shutdown knotact after use of kmail, calendar,knode or contacts. Window closes.
2. check with KsysGuard, Kontact process still running.
3. I do not end process and do normail shutdown, restart or logout. Kontact will not start when you come up again. Desktop, etc comes up Ok. If you then go into KsysGyuard and kill the Kontact process, and then start Kontact it wil start.
4. If you kill kontact before shutting down, etc then Kontact starts when you come up again.

No errors in log I can find.
Actual Results:  
Have to manually kill thekontact process before leaving system or after system comes up and the start Kontact.

Expected Results:  
expect Kontact to start after powerdown, restart or logout.

openSUSE 13.1(Linux 3.11.6-4-desktop x86_64|
Intel(R) Quad Core(TM) i5-4440 CPU @ 3.10GHz|8GB DDR3|
GeForce 8400GS (NVIDIA-Linux-x86_64-331.38)|KDE 4.12.1