Same problem here, all wallets had last block synced about 2.5h before.
I am running the 1.0.1 wallet on windows and linux, same problem.
I tryed redownloadeing the blockchain over the menu -> same problem
Strange thing is, that if the wallet keeps running it is getting more connections and the miner can be turned on
As Kazadar pointed out, Block explorer is paused also any many of us share issue - most likely wont be anything we can do our end right now. I was about to cycle this on my miners but did it on one and got the same result as you

edit:
Maybe the 40 minute ago #2392 block has something to do with it?
http://i.imgbox.com/4rMZknlW.png