seamonkey-2.0.4 crashes after last gnome upgrade

[barbara]

After upgrading to the last gnome, seamonkey is crashing very frequently with the following error:

The program 'seamonkey-bin' received an X Window System error.
This probably reflects a bug in the program.
The error was 'RenderBadPicture (invalid Picture parameter)'.
  (Details: serial 999452 error_code 169 request_code 149 minor_code 7)
  (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.)