Is the reputation on superuser working properly ? My reputation just decreased from 101 to 100, without any adverse activity.
You cast a downvote. That costs 1 rep (to discourage rampant revenge down-voting). Don't worry; you won't miss it.
2I guess there was some delay in the rep getting updated.– AbhinavJul 15, 2009 at 12:22
also note that this only happens for a downvote cast on an answer Feb 26, 2012 at 20:53
1@Nate at the time I posted this, this was not the case, you are right now though. Feb 26, 2012 at 20:58
Did you downvote a question or answer? That subtracts 1 reputation from you.