We've had a vote to enforce the no pictures in signatures rule.
We decided ages ago we didn't want them, there is an avatar picture, avatar signature to stamp your individuality on your posts and you can put links in your signature to any personal pages you have etc.
More and more keep appearing so it's time to do something. So if you could remove pictures from your signatures that would be helpful to stop me having to do it. We're gonna purge them over the next few days anyway, in case people miss this notice.