--- Operating System, Graphics card ---
MacOS X 10.7

--- Blender version with error, and version that worked ---
2.68, I tested 2.67 and 2.60 with no sucess

--- Short description of error ---
I copy a strip, open another file and paste the strip. If it is a strip with video or sound Blender crashes. Tested with images and no problem with that.

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
Import some video or sound into the sequence. Copy it. Open another file or open a new one. Paste the strip.