i think it can be related to that bug reported by doon: iconcache stall
http://kmeleonbrowser.org/forum/read.php?3,60195,page=3
i'll try to test on win98 but it doesn't seem to be happening on all 98 systems
that site also has a favicon so it could be triggering the freeze.
try this.. i'm not sure if it will work with that problem..but it used to work with 98 graphics freeze on some games in my 98
open your display properties and click on the advanced button and fiddle there..really fiddle..things like
graphics adapter troubleshoot:
you should have a slider to decrease hardware acceleration..try decreasing it and see if that has any affect
also sound graphic cards have something called write combining..this is normally good if you have a powerful system but can cause problems fin lower configurations..see if it makes any difference if you disable it.
also if your graphic adapter properties gives you an option to change agp speed..try there..also if you know your way around bios(especially with integrated graphic cards) you should have more options there [speed vs stability] thingies..try those as well
i hope this helps.