All my Masternodes were showing up with the Safe mode error last night on the current version (0.11.0.11). I started with -reindex and remove peers.dat and did a grep on them all. Everything was fine for around 12 hours but they're now showing up with the same error again. Is this a known issue? Just wondering whether it's worth reindexing again or just wait for 0.11.0.12.
All that error is telling you is the presence of a potential fork. If you deleted your peers.dat and reindex and are caught up with drk.mn or explorer.darkcoin.io (doesn't hurt to match the block hash), you're fine.