Well, I'm now often getting the problem that some pictures don't show up, and are just replaced by this symbol:



This generally shows up in my signature (I can't see the image that's in it), and one of the pictures in my log, around the top.
I honestly don't know why, I've used both Firefox and Chrome recently and they both seem to do it.

Any help?

Try uploading your image with tinypic:
http://tinypic.com/

Although this could work with my signature, I still don't have a way of sorting out the tracking signature.