well, I'm not sure what happned but the problem fixed itself. I suppose an update fixed the problem?
I finally fixed this annoyance thanks to C Anthony. The problem was in old pam files. I just replaced /etc/pam.d/kde, kde-np, login and passwd with the corresponding .pacnew ones and now everything is running as it should.
@ttouch: Please do test suspend functionality with the latest ck build v3.10.1-2. If you are no longer experiencing any problems I'll start a new thread.I can still easily reproduce the failed suspend problem on ck-kernel v3.10.1-2.