System Information
Mac OS X 10.9.5
Blender Version
Broken: (example: 2.72)
Short description of error
When I try to pack the content of VSE (I see this behaviour with images), blender returns the message "No new files have been packed"
Exact steps for others to reproduce the error
Put some images into VSE and try to pack with "File - External Data - Pack All Into .blend"