It does work, it worked for me anyway, and still does 9 years on Starlet, Nic is right you can't see my sig photos yet, but you can see these. I have lost nearly 12 stone on Atkins.
You need 50 posts to see a signature for some reason or other, but a post with attached photos can be seen as soon as you join. I think you need 50+ posts to be able to post photo's though.