I have a similar problem with kdenlive now. The kdenlive config wizard claims mlt sdl module not found and that kdenlive will not work without it. libsdl is installed and mlt is merged with sdl flag.
media-libs/mlt-0.7.6 (/usr/lib64/mlt/libmltsdl.so)
Any idea why it's not finding the sdl module?
*edit* It's obviously using it, but crashing:
http://pastebin.com/hWzJ0Mss
*edit*
Updating kdenlive to the *unstable* 0.8.2.1 fixed it and it's now no longer crashing.
This old 0.7.6 should really be removed from portage and 0.8 marked as stable.
