From what we can tell there's a uncommon condition on the network (seems to be about 1 in 10 clients), where some databases have became corrupt. Please check your logs for these messages:
--
2015-02-15 17:34:26 ERROR: ReadBlockFromDisk : Deserialize or I/O error - ReadCompactSize() : size too large
OR
2015-02-15 17:34:26 ERROR: ReadBlockFromDisk : Errors in block header
---
If you find entries like that delete ~/.darkcoin/blocks and chainstate, then resync from the bootstrap:
https://github.com/UdjinM6/darkcoin-bootstrap
Thanks 
3 machine's debug logs scanned and checked, all good here, including one local masternode wallet

I heard earlier there was a mined block of 2.6 darkcoin, is this connected, was it forked off or orphaned then?