Personally I would have preferred Mach 3 to have stopped development fully, at least until Mach 4 was out and working well, except for serious bug fixes of course.
These latest things, especially the Turn ones are clearly new bugs as they are only present in the latest versions.
Sad thing is some get sorted, others dont, it seems if its an issue with Mill it will likely get sorted, if its a new, introduced, issue with Turn then no chance of it getting looked at it would seem.
Hood