I was about to report this. This is a REALLY tricky bug but I now manage
to reproduce it within 30 seconds...

1) open totem
2) play a music file (please use the (public domain) Amiga .mod files I will 
attach below, for some reason, I manage to reproduce the problem more easily 
with those -- but it also occurs with mp3s)
3) now drag a 2nd music file above the totem window. DO NOT DROP YET ! Just 
move the mouse cursor very quickly BETWEEN THE VISUALIZATION (goom enabled) AND 
PLAYLIST panes. Do it for about 15 seconds
4) the file icon may disappear after a few seconds. If it doesn't : play the 
2nd file and drag the 1st file (& goto 2 until the problem occurs)
5) once the dragged icon has disappeared : the GUI is completely locked. 
Actually not completely :
- the music is still beiing played
- you can still move the mouse cursor but its state is frozen (it can be a 
"move" "add" or "normal" cursor)
- sometimes you can still scroll within the playlist -- as if the mouse cursor 
was "locked" inside the playlist
- nothing else responds and you have to kill the X server !

This is a really weird bug but I managed to trigger it about 15 times in
half an hour. Please try with the "mod" music files below. I also attach
a gdb backtrace (with the totem symbols installed but maybe more are
required ?) -- I started gdb until the text console and exported the
display for totem.

Please note : I am using the nvidia proprietary drivers. I triggered the
bug with both compiz enabled AND disabled.

** Attachment added: "gdb backtrace with totem & gstreamer symbols installed"
   
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/660222/+attachment/1765870/+files/gdb-totem.txt

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https://bugs.launchpad.net/bugs/660222

Title:
  Totem freeze when click and drag a folder or folders  

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