Comment 11 for bug 182923

Yes, it could be a possibility. Maybe you can try to install the GNOME debugging symbols and get a couple of backtraces. Assuming you run Ubuntu:

  sudo apt-get install gnome-dbg
  export LD_LIBRARY_PATH=/usr/lib/debug:/usr/lib/debug/lib:/usr/lib/debug/usr/lib
  gdb mail-notification
  run
  <when it starts hogging the CPU, hit Control-C>
  thread apply all bt
  cont
  <wait a few seconds>
  thread apply all bt
  cont
  <wait a few seconds>
  thread apply all bt
  cont
  ...