I've noticed that when you click on an image that was uploaded to the website, it continues to load and never shows up. Though, I have also noticed that if you click out of that, and then click on the photo again, it does load up. Didn't know if anyone else was having that problem (I have it on both my Mac and my Windows computers).
I just checked a few attachments and your gallery pics - it seems to work fine. Could you provide an example?
I actually have to same problem Swamp does, it happens with all pictures posted as an attachment, not galleries, etc.