I had that, too. And while syncing, it sometimes stopped for ages. Around block 90 000, slightly above 100 000 and around 180 000 I think it was.

When I became too impatient, I deleted everything in the data folder (apart from wallet.dat  ), and started new. Now 3rd attempt, I am synced, finally. Sigh.

The debug.log had strange messages, if it is of any use, I can post them.

But essentially it got solved - through patience.