Can this be the cause/fix?
From: "Tony Gilbert"
Error: Object Expected - Images won't load
My problem is with I.E. 6 and Norton Internet Security, where some images on
a page load and others don't. All are available if you persist in clicking
"show picture" for each image.
It seems that Patch 4.03 for Norton Internet Security causes images loaded
from another server to be blocked by default - HTTP-REFERRER auto-block -
and must be enabled on a SITE BY SITE basis!!! Surely there is another
solution?