I had similar problems with IE5 locking up my machine on certain pages (including one I was developing!)
Turned out it was a bug in the display driver (ATI Rage 128 Fury 32Meg).

Could be a possibility on your system?...

Jazz
(List 112, Mk2 12 gig #40. Mk1 4 gig #30. Mk3 1.6 16v)
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Jazz (List 112, Mk2 42 gig #40. Mk1 4 gig #30. Mk3 1.6 16v)