When I edit my signature the following rules are listed:
Your signature may contain:
* Up to 1 images
* Images up to 500 x 150 pixels
* Any number of URLs
* Any number of lines
Are those the only rules for signatures now? Does that mean, signatures may be as tall as we want now? I think that's not a good idea, your old size rules were perfect and prevented the users from having huuuuuge signatures which would be most of the time taller than the actual post.
Please also limit the amount of lines for the signatures. Also restrict the file size of the image again please.