Firefox Segmentation Fault

[Darryl Tidd]

Hi all, I'm running Firefox 3 on Ubuntu 8.04.
When I go to Yahoo mail I Firefox shuts down, not the only website this 
happens on, but I don't remember the others at this time.  So, I start 
Firefox from a terminal and when it shuts down the terminal says 
Segmentation Fault.  Sometimes it shows this message: (firefox:4957): 
GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT 
(object)' failed
Segmentation fault


Any help will be greatly appreciated.
Darryl