FC2 system lockup under Mozilla 1.7.7

[bof]

Hello,

I am running FC2 on a PIII 700.

When trying to access certain webpages under Mozilla 1.7.7, the system 
locks up completely: the screen, mouse and keyboard freeze. The only way 
that I can recover is to hard reboot the system.  I have also been 
running a file system integrity check when offered, as the system did 
not shut down cleanly.

I never know which pages are going to do this -- they occur randonly as 
I browse the web. Here is one example:
   
    http://fedora.redhat.com/docs/release-notes/fc4/.

This particular page locked up the system under Mozilla but load and 
worked as it should under Konquerer 3.2.2-8.FC2.

What is happening? And do I really need to run the file system integrity 
check?

BOF