nautilus problem

[Håkon Wium Lie <howcome opera com>]

I'm having a problem with nautilus that I hope someone can help me
with: nautilus takes up much of the performance on my machine, anywhere
from 20% to 80%, as reported by 'top'.

I'm using Ubuntu 8.10 on a Thinkpad X41. I recently upgraded from
Ubuntu 8.04 to fix the behavior described above, but the problem
persists. At some point, nautilus and evince-thumbnailer both took up
performance and I've therefore disabled the generation of thumbnails
(using gconf-editor to set desktop/gnome/thumbnailers/disable_all).
However, nautilus still takes up perfomance of its own. I'm not using
nautilus as my file manager (I use Opera, emacs and xterm :) so I
don't see any reasons why nautilus should demand much. Using strace,
I've recorded lots of these:

  clock_gettime(CLOCK_MONOTONIC, {75791, 103634987}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 103804003}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 103972111}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 104160962}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 104330537}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 104498295}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 104668149}) = 0
  clock_gettime(CLOCK_MONOTONIC, {75791, 104843451}) = 0

I've deleted ~/.nautilus to try remove any settings that could cause
the behavior. 

When running nautilus manually, I get this output:

  Initializing nautilus-share extension
  seahorse nautilus module initialized

  ** (nautilus:26661): WARNING **: Unable to add monitor: Not supported
  Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
  Please ask your system administrator to enable user sharing.

Help is appreciated.

Cheers,

-h&kon
              Håkon Wium Lie                          CTO °þe®ª
howcome opera com                  http://people.opera.com/howcome