After 4984 block, released 1.1.1.3 version and added two mining algorithms and replaced difficulty retarget for this, if you mine with oldest 1.1.1.2 - you mine on forked chain, i warned of this before update release...
Is that means lose all coins after each updates? I was mining at latest wallet in that time, and after update all coins are lose, usually after fork coins save at address but there is not worked, very very weird system