Development on MT86 had stagnated so some others took the ball and ran with it. Now the original is getting caught up. I run five testers MT86, MT86+, the one you can DL from M$, CheckIt's memory test and the one in VCom's SystemSuite or FixIt utilities. Usually if I can run all 5 then the problem is somewhere else. You can go the the web sites for the two MTs and they list the new features in the releases (usually called Release Notes).
.bh.