kdenlive compiled from wizzard was working fine, untill few days ago i recompiled again and now it won't start. "caused the signal 11 (SIGSEGV)"
Application: Kdenlive (kdenlive), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb5e58ad0 (LWP 10310)]
[KCrash handler]
#6 0xb3391974 in ?? () from /lib/libselinux.so.1
#7 0xb338ab8e in ?? () from /lib/libselinux.so.1
#8 0xb33831d8 in ?? () from /lib/libselinux.so.1
#9 0xb3393350 in _fini () from /lib/libselinux.so.1
#10 0xb7f5e72f in ?? () from /lib/ld-linux.so.2
#11 0xb7f5f017 in ?? () from /lib/ld-linux.so.2
#12 0xb63a6c84 in ?? () from /lib/tls/i686/cmov/libdl.so.2
#13 0xb7f59716 in ?? () from /lib/ld-linux.so.2
#14 0xb63a701c in ?? () from /lib/tls/i686/cmov/libdl.so.2
#15 0xb63a6cba in dlclose () from /lib/tls/i686/cmov/libdl.so.2
#16 0xb45c9876 in mlt_register (repository=0x9021178) at factory.c:295
#17 0xb7f4589b in mlt_repository_init (
directory=0xbfb68c23 "/home/rrr/kdenlive/lib/mlt") at mlt_repository.c:90
#18 0xb7f44cfc in mlt_factory_init (
directory=0xbfb68c23 "/home/rrr/kdenlive/lib/mlt") at mlt_factory.c:93
#19 0xb7f149a1 in Mlt::Factory::init ()
from /home/rrr/kdenlive/lib/libmlt++.so.1
#20 0x081d5fa5 in initEffects::parseEffectFiles ()
at /home/rrr/src/kdenlive/src/initeffects.cpp:120
#21 0x080d3ef3 in MainWindow (this=0x8ff2a20, MltPath=@0xbfb683a0,
Url=@0xbfb68388, parent=0x0)
at /home/rrr/src/kdenlive/src/mainwindow.cpp:129
#22 0x080bb825 in main (argc=3, argv=0xbfb684f4)
at /home/rrr/src/kdenlive/src/main.cpp:71
#0 0xb7f66430 in __kernel_vsyscall ()

do you have frei0r installed?
i think it started to happen after i installed the libfrei0r-dev package, so i removed it.. but still not working
after reading this thread:
http://kdenlive.org/forum/binaries-ubuntu-810
i removed the frei0r (no the -dev) package and it started working again