Something was changed about this miner's devfee server on the night of May 21rst and it has made it completely unusable.  I'm fine with a fee existing, I knew about it when I chose to use the program, but this miner is borked right now.  Undo whatever was done to it on that night and the following days.

EDIT: 5/30/18 Seems the newest version (3.10) is now working normally again for me. I've not yet run it overnight, will report back with longer term results.

Edit: 6/1/18 The behavior of the v3.1 mkxminer is back to what it was before May 21rst.