A short drop in hashrate?  The avg 30min hashrate dropped below 100ghs from what I saw.  The pool mining addresses were a black hole on the internet.  Ironically, as I was typing this, all of my miners had to reset and reconnnect.  Doesn't seem like it's 100% fixed yet.  Payouts have also decreased.  Have considered moving rigs to another pool til slush sorts it out.  Have been here since I started mining with cpu.  Will hate to have to move due to unreliability.