I've been running Redhat 6.0 at home and Redhat 6.1 at work with 
their stock Netscape installs with no problems.  Recently, I upgraded 
both machines to Redhat 6.2 (including its stock Netscape 4.72), and the 
following problem appeared on both:

If I use Netscape to download a file via ftp, and press Ctrl-Alt-F1
to switch from X to a text console, then Netscape freezes and takes up
100% CPU; UI is frozen, and the file transfer is halted.  At this point 
I can only use 'kill -9' to kill it.  

Switching between GNOME virtual desktops within X seems to cause no 
problems.

The home machine is a random clone PII 233, while the work machine
is a Dell OptiPlex of some sort with PII 400.

I have upgraded both machines to netscape-communicator-4.73-1 and 
upgraded the home machine kernel to kernel-2.2.14-12.i686 and the problem
still persists.

Any light you can shed on this subject is greatly appreciated.