Comment 2 for bug 516946

Upon investigating further, it seems that the problem is caused by unreadable files. I think this because after copying a sub-directory tree in /home (which induced the error) except for one unreadable file (.gvfs), the copy didn't produce the error any more.
It would be good to catch the point when the program encounters the unreadable file, and what it does. It is quite interesting that the error is produced only if --exclude is specified.