I got 2.8 M NUTs at block 52963 and when I stop mining, the block count stopped  
So be sure you are not alone on your own fork ...
Then I checked my 'getinfo' and I realized I was on protocol version 70002 instead of 70003 although I updated the client a few hours ago

After the client updated I am back to 500k NUTs

So I virtually lost 'NUTs' but at least I am happy to learn a lot  

restart procedure is described by OP in post #301:

1) close nutcoind and/or the wallet
2) be sure it is not remaining in activity monitor (force close it if needed)
3) edit nutcoin.conf, and be sure there is ONLY this node (protocol 70003) :
addnode=192.99.4.55:9508
4) remove peers.dat
5) git pull an recompile the daemon with the last version (protocol 70003)
6) restart nutcoind or wallet
This will shutdown and burst every peers connected with the old version 70002, forcing them to download the new version.