Weird lockup

[Alexandre Strube]

My machine is behaving strangely for about a month. It completely
freezes when gnome's file dialog is about to appear.

For instance, if I choose "save as" in gimp, my machine freezes - no
mouse, no keyboard, no answer to ping.

This happens also with firefox's upload file button in a html form, for
instance to send a picture to fotolog.


kernel is 2.6.11-1.14_FC3

Some of the installed versions are
gnome-desktop-2.8.0-3 
gdk-pixbuf-0.22.0-15.0
gtk2-2.4.14-2.fc3