I've been having wifi drop from my Samsung Galaxy S2. I tried all of the 'fixes' in wifi settings on my phone and also updated rom from stock 4.2.1 to PA 4.2.2. In my router log it says:
Nov/02/2013 14:59:52 Drop UDP packet from WAN 79.22.227.42:50616 98.219.206.212:43438 Rule: Default deny...