There have been some recent issues with BatCoin, including a forking of the blockchain, leading the client to get stuck at a certain block.
This issue has been resolved however, and syncing is painless again. You might lose some Batcoin because of the forking though, so keep an eye out for that.
The updated Batcoin client can be downloaded here :
NOTE : Remove the old blockchain data to sync up properly, but keep your “wallet.dat” file intact.