totem crashes when draging slider while playing dvd

Binary package hint: totem

This problem occurred when I played a dvd, self made dvd-r with 4 hours of video. I tried to skip a piece by dragging the slider to the right.

Then totem begins to seek to that point (I can hear my dvd-player working harder).
Now the following things can happen:
- if I forwarded a small piece, it works fine (about 1 min) (probably loaded in the buffer already?)
- if I forwarded a longer piece, this is my observation:
   - totem is busy seeking, but when I dare to touch the slider again, totem crashes. When I am patient the image of the scene shows up, but it doesn't play further.
   - but when I drag back to the beginning (same part in which worked fine first) it works fine again
   - when I drag a longer piece to the right after I dragged to the beginning again, totem crashes immediately
   - when I start playing with the slide-bar, totem always crashes :P

The first 2 times I got bug-reports. After that I tried to install some debugging-symbols, but now I don't get a bug-reporting window any more (maybe tomorrow...).

I now installed libtotem-plparser1-dbg (which isn't useful I think?) and libmpeg2-4-dev (found it in the stack trace). Which debugging-symbols are useful?