We just update our wallet to latest from github but it does not sync. It was able to get 3 blocks and then stop. We tried to sync from scratch with fresh wallet.dat - same issue.

Here is what happening in debug.log for freshy launched wallet with empty data dir:

SetBestChain: new best=00000f8923e2585d5cbd  height=1  trust=2097154  blocktrust=1048577  date=11/08/16 17:38:49
ProcessBlock: ACCEPTED
received block 00000047b8d42ab011bc
SetBestChain: new best=00000047b8d42ab011bc  height=2  trust=3145731  blocktrust=1048577  date=11/21/16 05:06:15
ProcessBlock: ACCEPTED
received block 0000004b8b45189977df
SetBestChain: new best=0000004b8b45189977df  height=3  trust=4194308  blocktrust=1048577  date=11/21/16 05:08:17
ProcessBlock: ACCEPTED
received block 000000299fe41f7a5aa0
ERROR: AcceptBlock() : incorrect proof-of-work
ERROR: ProcessBlock() : AcceptBlock FAILED

After that it disconnects from node and does not get any new block. Anybody can suggest a solution?

About all deposits sent to C-CEX wallet. They are all valid and will be registered once we will be able to sync.