this thread shows everyone as a "guest" instead of "senior member", "moderator" etc. maybe this is a known issue, it just looks weird.

It's a very old thread that was created using a version of UBB bulletin board software that didn't translate properly when we moved to vBulletin.

Here's another example:
http://www.dvdtalk.com/forum/showthr...threadid=68767

I like how it says "Registered: Not Yet"

If I remember correctly, Geoff was having a dinner party and invited his guests into that thread where a discussion ensued.