when someone reps you on the post that they gave you the + youll see that theres a vertical Green bar there. Like where on the post there should be the +/- there wont be because A) its your post(cant rep yourself) B) will be replaced by the Green bar.
thats the only way you can figure out where you get the rep, kinda stinks you dont really know who gave it to you but most of the time you could figure it out
Subject: Reputation 
9/4/2010, 5:40 am
