Intermittent Images not showing for some users

Ok, nightmare of a problem from a diagnosis standpoint.

Some of our users are telling me that they can’t see images on my blog (www.hooniverse.com). Most report this happening in Firefox.

According to complaints, it’s intermittent. I’ve never been able to duplicate it on my machine.

In the screenshot someone sent me, the borders match the width of the pictures, but have 0 height. Meaning they turn into a wide horizontal stripe. This is also to say that I’m not getting the typical “dead image” box with an X.

There is one useful clue, however: pictures that I have hosted (and hotlinked to) on my flickr acct always show up.

Could this be related to my hosting and not wordpress at all?

Since it’s intermittent, I don’t think it’s file/directory privileges issue.

My only idea was if for some reason images are loading slowly and FF decides to just stop them as a timeout error or something…?

Any tips?

Thanks in advance.