[RARING] Zeitgeist 0.9.5 + other app = kernel panic

New install on an HTPC (Atom D525) with Ubuntu Raring. Kernel Panic occurs when I run a big application like flashplayer or pcsx-r. I tried to install Xubuntu (lighter for small config) Raring and I had no problem using the same apps. Then I install Ubuntu One (not provided with xubuntu) and I had Kernel Panic again. As I found old bug reports (for ubuntu 11.10) pointing out zeitgeist, I tried : xubuntu + flashplayer --> works fine, xubuntu + flash blayer + zeigeist (without U1) --> Kernel panic. I repeated the test 3 times. It takes at least 10 minutes watching video before kernel panic occurs with zeitgeist whereas without zeitgeist I have been watching videos during more than 40 minutes each time whith no matters... (but I have no more time to loose watching stupid cats on youtube).
I apologize for my poor english.