I am seeing a similar issue in IE 8. One computer does not display images at the correct size, they are all reduced by about 40%. This only happens on one specific computer and with IE 8 only .. other computers with IE8 are fine.
I've tried replacing the module and inserting newly named images .. still occurs. Also occurs with other instances of the module on the site.
We believe it's a quirk with the specific computer, but any insight is appreciated.
Thanks
Kelly