this appears to be connected to the Greek stockmarket collapse and capital controls that are most likely being bypassed using Crypto
Or maybe it's not, and BTC-E is pulling shenanigans again

its s reflex action and most likely a panicky one could be more upswing tomoz
there was a $250,000 wall today trying to keep a lid on things
since when is a less than thousand btc wall so special? look at bitstamp and especially at bitfinex, you'll find plenty of these walls.