I didn't change anything intentionally, but it could be a side effect of upgrading the version of PhpBB when I switched servers recently.
For now, I think it's okay but let's be tasteful, as with the avatars. I reserve the right to say that your sig image is 1) too damn big or 2) too blatantly commercial, or that a whole bunch of them are making the whole site look like a Nascar car.
We should respect the other fellow's religion, but only to the extent that we respect his theory that his wife is attractive and his children intelligent. —H.L. Mencken
You have a signature now, but your old posts do not have the box checked, "Attach a signature" under "Options". If you really want you can edit your old posts and check that box and the signature will appear.