Some kind of weird bug, but let’s start:
# less /var/log/messages | grep vlc Apr 27 11:06:31 kernel: vlc[16022]: segfault at 0 ip b63b9c47 sp b152cda0 error 4 in libQtCore.so.4.4.3[b6365000+224000] Apr 28 12:24:48 kernel: vlc[19555]: segfault at 0 ip b1cb361a sp b1435a50 error 4 in libQtGui.so.4.4.3[b16bc000+8d9000]
when doing fullscreen in vlc 0.9.9a.
Solution:
Go to Settings -> Preferences
Tick All
Input/Codecs
Other Codecs
Subtitles
untick format subtitles