I am having the same issue. I have sent coins from bittrex to my local PC wallet, and the coins have not arrived. The transfer was initiated and marked "complete" in the Bittrex Withdraw Status screen well over 4 hours ago. I know blocks are traversing the network as they should, as I also sent NAUT coins from Cryptsy to my PC wallet about 10 minutes before I sent the ones from Bittrex, and the ones from Cryptsy made it to my my PC wallet without any problems. By all indications, the blockchain is current, as
http://nautinsight.buddylabsapps.com/status shows that it is in sync. Checking the receive address of my PC wallet in the blockchain explorer at
http://nautinsight.buddylabsapps.com/status, I do not see a transfer for the amount of coins that I sent from bittrex, even though bittrex is showing the transfer as complete in it's withdraw / transfer status screen. At this point, it appears that the issue is with bittrex, and not the NAUT blockchain. I am submitting a ticket with bittrex support, and hopefully they will be able to resolve the issue or tell me what is going on...
FYI... it does look like the blockchain is stuck again... After writing the above post, I closed my NAUT wallet (which appeared to be synced, no out-of-sync indication). After re-opening the wallet, it is saying that it is 3 hours behind... I guess all there is to do now is wait for the stuck block to get solved and hopefully the coins will make their way to my wallet...