Hi, before passing this on to the issue tracker I would like to check if this is happening to someone else.

I'm running a Fedora 11 64bits desktop with KDE4.3.2, recently I upgraded my Qt-4.5.x packages to qt-4.6.0-0.2.beta1.fc11.x86_64... without wanting to, or knowing the consequences it might have on other apps.

Today I launched kdenlive 0.7.6, and I got strange bugs when placing clips on the timeline... see linked image:
http://picasaweb.google.com/fede.caceres/Kdenlive#5395946358486891906
You can see that the clips are not snapped to the timeline's tracks or to each other... and you can even overlap them! If you playback the movie, you get the expected results, but when moving the tracks and replaying the movie the changes are not visible on the project monitor :(... or even worse, you might get an instant crash. If you manage to save and reload the file, you'll see that kdenlive ignored your placement of the clips (for instance tracks 1 to 3) and places them on track 0.

I had to revert from Qt-4.6 to Qt-4.5.x... and it was not THAT easy, it took some time figuring out that Qt 4.6 could be the culprit, and some dependencies had to be broken to go back (using rpm --oldpackage). Once I did that, kdenlive worked perfectly again :D.

So, anyone experienced this?
It might be interesting to check if it is broken on kdenlive's or Qt's side before Qt 4.6 goes live.

Cheers!

Yes, I confirm the issue. That is due to a change in the way Qt handles graphic items. I have committed a fix to svn, and Kdenlive will need to be recompiled against Qt 4.6 to work.