kdenlive crashes on Kubuntu Gutsy 7.10 x86_64

Hi, I have tried Kdenlive 0.5 (KDE 3.5.8) on my Kubuntu Gutsy. Most times it crashes, when I try to open a clip (mpg). When it isn't crashing, and I try to start the clip the picture falls and in the clipmonitor are only stripes. When I stop the playing, the current picture is okay.
attached is the error text
where is my problem ?

Thanks, harvey