When you open an archive in file-roller and drag some of its contents over the Places side-bar in nautilus (just over, not dropping), nautilus will exit with a return code of 1.

I couldn't get a back-trace, but this was in the .xsession-errors:

The program 'nautilus' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadAtom (invalid Atom parameter)'.
  (Details: serial 12880 error_code 5 request_code 24 minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

I've seen this on Mandriva and Debian systems with what I assume is stock Nautilus 2.28.0.