Firebug and Firefox
I just tried to use Firefox and Firebug and images that appear fine in Internet Explorer are completely missing in Firefox!
http://www.ledwarehouseuk.com/shopping-basket.php
On our basket page, we have a refresh icon next to the quantity box but, in Firefox, it's just not there. Yet our reference for it is fine, otherwise it wouldn't be displaying in IE would it.
Firebug isn't seeing any problem with the file reference.