Damn slow transfers. Sent from MintPal 1hr ago and not yet recieved in Poloniex. 
I also got the same problem I have one and a half hours ago winthdraw of the poloniex and is still a blank confirmation
I've checked in block explorer but the message coming out is " invalid query. valid search queries are: block height, block hash, transaction hash or address. "
Yeah the block explorer says current block: #96273 time 2014-06-10 01:33:52, that's quite some time ago
Edit: Block explorer now can find my transaction. And it has arrived.