Meh

Yeah, something's not right. What did you see while editing under the edit form? Was your sig there? It only seems to be happening when you're starting a new thread.

My sig is under the post.

I think I've figured it out.

Ah, I see, you middle clicked on Start a new discussion, which brings you to the non-javascript version of the edit form. If you just left click on it, it'll be loaded on the current page, and the signing will work. Off to fix the bug then.