Yes, I know, still no passwords manager...
Maybe it's a problem between the website and WebKit. I'm using FreeBSD 10.1 and most images I found on the home page display fine. Only a few of them caused the problem you're describing.Or maybe it's just a problem with the website. I tried it in Opera and the images that didn't work in Otter were shown, but with a weird background image with a "Clear" alttext.