This release corrects:
- a timing miscalculation in the TMS9918 (and derivatives) which affected Master System After Burner;
- an error in Apple II card state management which could cause cards to acquire an extra clock cycle from the aether (and, in practice, thereby broke Disk II writing); and
- a more generic error in time counting in drives with a fixed rotation speed that crept in when variable-speed drive support was added for the benefit of the Macintosh and potentially affected all other emulated machines in fairly subtle ways.