It happened on some devices (like my Nore 3) at 4.4. Android TKIP encryption seems to noo longer be compativle with router TKIP encryption. (Aren't standards wonderful? Wouldn't it be nice if we actually had some?) Even using AES, ny Linksys (best router on the market for home use, right?) would take about 3 years to load a FB video. I bought a Netgear WNR2000 for $40 (normally I wouldn't touch any but the most expensive Netgear routers), set it to AES encryption (and told the phone to forget the connection, then connected again) and although Facebook doesn't pop up like it's in my local storage, it doesn't take a whole second to show the picture or video when I scroll.