Read: Signature size rules
There was a error in the signature requirments when uploading a signature and the forum rules. We have fixed that error and have made it match the forum rules. The rules states "Maximum dimensions for signatures is 110(height)x450(width), maximum filesize is 150kb. ONE IMAGE ONLY!" This size is the same dimensions as in the old AO. If you have a signature that exceed these dimensions, please replace them. We are enforcing the rules. Sorry for any confusion and mixup.
If there are futher questions PM (Gallcomp :P) or the administration.