[#10210] You are not allowed to use that image extension on this board.

jankar, on 02 June 2011 - 03:14 AM, said: I just wanted to insert a small picture in my profile's signature and got error:
"[#10210] You are not allowed to use that image extension on this board. "
The picture URL is:
http://imageshack.us...13/1222235c.jpg
I read this thread several times and found no glue what could possibly cause this error and how to fix it. I would much appreciate any assistance to solve this problem.