Had the same issue. I get an error something to effect of "Wifi disconnected because internet is connection is slow". I seemed to correct it by going to Wifi advanced settings and unticking box for Always Allow Scanning and Auto Network Switch.
HTC G1 - Blackberry Bold 9700 - HTC Incredible - HTC Thunderbolt - Samsung Droid Charge - LG G2X - Samsung Galaxy S II (E4T) - Samsung -Galaxy Nexus LTE - Galaxy Tab 10.1 Wifi - Droid Razr Maxx HD - Sony Xperia Z
Beastsung Galaxy Note 3 White