Vista - IE & Firefox Won't Load an Image Anymore

Hi all, I've got a new and weird issue. I'm on Vista x64 with all of the updates as well as the latest versions of IE and Firefox. I work on TrailDamage.com and haven't made any changes to the banner in many, many years but all of a sudden the single image that holds the logo and the words "TrailDamage.com" is not showing up. My first thought was that I'd been hacked, but it doesn't appear that way. Next, I found the image on my computer (it looks fine) and uploaded over the top of the old one. I still can't see it. The behavior is the same in both IE and Firefox.

For example, if I go to any TrailDamage.com page I can't see it. If I go to http://www.traildamage.com/images/_boilerplate/logo_banner.jpg I see nothing, an empty page. I uploaded the same image to http://www.traildamage.com/images/_boilerplate/logo_banner2.jpg and I see that one. The odd thing is that if I go to these pages and links on another computer I can see everything in IE, so I know it's just a problem on my end.

IE and Firefox both have the same symptoms, so it seems like it's some Vista setting they share between them or I have a virus or some other bug (I have no idea what that could be). I looked at the site yesterday and there were no problems so this just happened today.

I deleted all of my temporary Internet files and reloaded the page. It grabbed all of the images again except for that one. Does anyone have any idea how this is happening? I'm really at a loss. Thanks!

Edit: I also saved the HTML on my computer and put in a base href to have it point to traildamage.com to get the images, and this also didn't work. Is there a way that my network could be blocking this single image? I'm using Kaspersky 8 and a Linksys router, both of which I haven't changed in a long time. If I open the original image on my computer I can see it just fine, so it's definitely something related to the site or to fulfilling the request for the image. This is driving me nuts.

Problem solved. My Kaspersky decided all of a sudden that the image was a banner ad and blocked it. I put the site in my white list and the image showed up again. It's weird that it just decided to block the image, though.

Maybe this info will help someone in the future.