**System Information**
Kubuntu Linux 13.10 64 bits
NVIDIA Geforce GTX 560 Ti. Drivers: 331.20
**Blender Version**
Broken: Blender 2.69.7 9bd3a22 (buildbot)
Worked: Blender 2.69
**Short description of error**
Blender crashes when change screen layout to "Motion Tracking". Segmentation fault.
Others layouts works well.
**Exact steps for others to reproduce the error**
0. Open blender
1. Change screen layout to "Motion Tracking" (top combobox)
2. Blender crashes
Crash textfile output:
# Blender 2.69 (sub 7), Commit date: 2013-12-20 23:20, Hash 9bd3a22
# backtrace
/soft/blender/blender() [0xfb7ac1]
/soft/blender/blender() [0xfb7d17]
/lib/x86_64-linux-gnu/libc.so.6(+0x36ff0) [0x7f8b91d34ff0]
/soft/blender/blender(BKE_tracking_object_get_active+0) [0x1626900]
/soft/blender/blender() [0x11f20ba]
/soft/blender/blender(clip_draw_cache_and_notes+0x4c) [0x11f4fac]
/soft/blender/blender() [0x11e2e24]
/soft/blender/blender(ED_region_do_draw+0x855) [0x127c1e5]
/soft/blender/blender(wm_draw_update+0x596) [0xfd09f6]
/soft/blender/blender(WM_main+0x28) [0xfbf298]
/soft/blender/blender(main+0x4fc) [0xfba2fd]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f8b91d1fde5]
/soft/blender/blender() [0xed40b5]
GDB output:
(gdb) run
Starting program: /soft/blender/blender
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffeebff700 (LWP 4986)]
[New Thread 0x7fffee3fe700 (LWP 4987)]
[New Thread 0x7fffedbfd700 (LWP 4988)]
[New Thread 0x7fffed3fc700 (LWP 4989)]
connect failed: No such file or directory
Read new prefs: /home/vjuan/.config/blender/2.69/config/userpref.blend
[New Thread 0x7fffebfff700 (LWP 4990)]
[Thread 0x7fffebfff700 (LWP 4990) exited]
[New Thread 0x7fffebfff700 (LWP 4991)]
[New Thread 0x7fffe6ffe700 (LWP 4992)]
[New Thread 0x7fffe67fd700 (LWP 4993)]
[Thread 0x7fffe67fd700 (LWP 4993) exited]
found bundled python: /soft/blender/2.69/python
Program received signal SIGSEGV, Segmentation fault.
0x0000000001626900 in BKE_tracking_object_get_active ()