And it's more than likely that the site you used for your Signature went down or banned your IP for using the picture and hosting it off of their server (IF that is the case).Acceptable Use Policy said:Signatures and Avatars
The following sig limitation size/rules are in effect and WILL be enforced.
No web pages on your sig whose total size is more than 600x200 (non-windowed) and no filesize to exceed 600k.
1) No pop-ups or automatic functions.
3) No music (unless it's on mouseover and this has to be declared.)
4) Multiple sigs totaling no greater than that size will also be accepted.
5) Any images containing anything that may be classified as offensive will be deleted by the appropriate authorities without warning.
6) Anyone found to push the boundaries intentionally will also face consequences.
7) While we do allow the "you're a" personality tests, we feel it is time to stop using them as sigs. Some of you have two or three of them in addition to regular sigs. This is very unfair to the people who pay to host those sigs; since they pay every time someone views your posts.
8) Nudity is not allowed, all subjects must have a minimum of swimwear or non-lewd clothing. In addition, suggestive posing is not allowed.