No, chain is fine for me and I have 16 nodes currently connected with all of them having an up to date blockchain.

I believe you can use 'rewindchain' in the console to make the blockchain go back to an earlier date. But I've never personally had success with it. You could also try deleting the entire chain and starting from fresh (make SURE to backup your wallet).

If you forcefully quit the client it could lead to corruption of the chain (At least that has been my experience with vTorrent as well as several other projects)