Strange - I installed this hack yesterday (2002-04-30) and had a look at my memberlist to see if it worked, but I couldn't see any one who had joined for "Today" or "Yesterday".
I then had a look at it again this morning (2002-05-01) and those that registered yesterday i'm seeing them as being registered "Today" and not seeing anyone as being registered "Yesterday" even though some people have.
My forums can be found at
www.webdevforums.com
Any help Big Matt would be appreciated.