* unavailable full screen modes are greyed now
* executable generated with profile guided optimization (up to 30% speed increase)
* tape regression bugs fixed
* CPU level 1551 init bug ironed out
* CPU level 1581 got accidentally disabled since version 0.77 (oops)
* XP/Vista theme support back again to normal
* worked around a TED idle cycle read inaccuracy (regression bug since 0.72)