It appears as if something may have gone wrong with your MPEG2 decoder.
Perhaps re-install one. Have a look at
adicoto's codec page.
Edited: just re-read your post and understand that you also have no picture with other files (AVI?). Perhaps try a different setting of Video rendering (under Options > Preferences > Video > Video rendering)
and/or also update your DivX codec to 5.1.1.