Safari: not loading page fully

Safari
Amazon.co.uk
search for any product, eg PS3
click on the "15 new from £187.00" (or similar) link
find a seller with a seller rating: click on the "nn% positive" link
top 7cm (& RH pane) load; below shows "Loading..."
the rest of the page never loads.
The same problem affects trying to see all customer feedback for a seller.
It is totally consistent, regardless of the item or seller selected: it affects Safari & Firefox on Mac and Internet Explorer & Firefox on WinXP SP3 running on VMWare on the Mac.
It does not show with Internet Explorer or Firefox on a Win XP PC; so is definitely due to the Mac environment, not the browser.
JavaScript is enabled.
I'm baffled! Any answers would be greatly appreciated.