System:
2 CPU E6750, 8GB memory,
Ubuntu 10.04, gnome, (kernel 2.6.32.30-generic-pae)
Kdenlive 0.7.9

Problem:
When I put a clip on the timeline, it moves freely across the screen.
See on the picture:
http://dl.dropbox.com/u/6176057/strange.png

Video about it:
http://dl.dropbox.com/u/6176057/out-1.ogv

Qt version?

Seems to be 4. I dont install some special.