No one has changed your sig permissions, afaik.
A friendly reminder, please keep your signature images to a reasonable size, no larger than 120 high, 400 wide. Max file size is 100KB. Sigs that are political or religous in nature may only be displayed in General Topics. Only naval-oriented sigs are allowed in the naval and game forums. Read More:
Personal Avatar, Signature, Image FAQs
http://www.subsim.com/radioroom/faq....ure_image_faqs