My problem was the reverse of DouglasDigby's - I had AOL5 and was running Netscape over the top no problem; but as soon as I upgraded to AOL6 ... mega problems!! Even now, with AOL6 uninstalled and AOL5 reinstalled, I find that Netscape usually 'freezes', especially if I have a couple of windows open - in particular PPRuNe, as it seems to be very resource-heavy.
Any ideas??