while navigating to my webpage. He was using Firefox. I was unable to reproduce the error in any of my test browsers including Firefox. Has anyone seen something like this before?
It doesn't look like an error, it looks like they stopped the page from loading (or it was stopped by something else) partway through the loading of a Javascript on the page. Does your site use that code snippet, anywhere?
I don't have any Javascript on the page but I am "masking" the page by nesting it in a frame through my host. I was not able to recreate this problem despite several attempts but it still bothers me if the error is related to the site. Still I am beginning to suspect that something enabled in my friend's browser resulted in the interuption.