Both work. People have used & to pass variables forever. In fact I've never seen anyone actually use ; until now. However, for the sake of making it look the same as whatever the flavor of the month is for the YaBB team, I changed all instances to ;.
A new file has been uploaded.
Also, the script as it was (using &) is in operation on my SP1 without any glitches. So I really think it's either/or.
Also (again) this version that I posted is a bit more bloated than the script I actually use. On mine I completely removed all the Yahoo, AIM, email, etc icons, wrote a parsing routing to only display one position (other than YaBB Admin/Mod), removed the post count, and removed the stars. That way the avatars lined up nicer with the bubbles. The only reason I didn't release that version was because I know a lot of YaBB users are hell-bent on post counts, their positions, etc, and rather than just omit the option, I figured they could comment out what they disliked accordingly. In my own personal use I like things short & simple.
Here's a picture of my board. If people tell me they want a trimmed version like this. I'll release another mod with that code instead.
One other idea I've toyed with is moving the name, modify, etc buttons, and post title, up to their own new level. Then having only the message & signature in the bubble and have the face parallel to the top of th emessage bubble that way. I just really havn't had a good reason to rwrite it that way though and I personally like having th ebuttons in the bubble. But it's the only other really viable alternative to bump up the avatar other than moving the name below it.
Suggestions welcome.