Experiencing problems with KDE after an upgrade

After an upgrade of KDE I am experiencing problems. A lot of problems. 1. "Konsole" doesn't starts at all! (I have to switch to a console with ctrl+alt+Fx login with username, export DISPLAY=:0 and start "Konsole"). The worst is that the process start already "zombie" which is not very good! 2. It's not only konsole that I cannot launch. It is even dolphin and many more applications. 3. google-chrome starts but it takes eternity! Then when I try to download anything the download doesn't start! Internally google-chrome put the download on queue (it is not visible on "Downloads" page) but it never starts. 4. Application launcher menu takes ages to show up. Anyone have any clue on these problems? My distro is gentoo. If you need more details ask and I'll give. EDIT: i forgot to say that if i launch application with root privileges, everything work fine.