I tested on a Win 7-x64 Virtual Machine PC with IE 8, it did NOT have the problem. I upgraded it to IE 10 and the problem recurred.
I tested on a Win 7-x86 Virtual Machine PC with IE 8, it did NOT have the problem. I upgraded it to IE 10 and the problem recurred.
Jeremy,
The above seems to point to IE 10 as the culprit. I wonder why you don't see the problem. Are you sure you set the zoom BEFORE you navigated to http://americansailinginstitute.org/fleet-gallery-2/? And scrolled to view the entire gallery?