I keep trying to have a picture in my signature area and it works for about 15 minutes. But then the little box appears and the picture is gone as you can see below =(. Anyone know why?
try uploading it to a different image hosting site
Upload to imgur.
Use Photobucket or Imgur as Ryan said.
I prefer Photobucket though.
Imgur. No adverts
Imageshack and TinyPic works great. Give those two a try.