Kdenlive immediately crashes with a segfault when importing clips.
As soon as the clips land in the bin Kdenlive closes down.
Images does import properly, all kind of movies crashes.

Threads is set to 1.
Kdenlive 0.8.2.1 on Ubuntu 10.04, 64-bit.

Here's the crash report:
http://dl.dropbox.com/u/2811229/TEMP/kdenlive-20120314.kcrash

Try building kdenlive from source with the build script.