If you have saved your BIAB compositions as MIDI files then loaded them into PowerTracks only to have stutters appear on pushed chords, or you have purchased GM MIDI files and drums disappear partially or entirely during playback from any playback source, you could spend time quantizing the drum tracks and editing the pushed chords but here's a simpler method: Just load the MIDI file into SynthFont and just save it right back to disk (as MIDI file). You may get a message about an unsaved "Arrangement" file when you close out SynthFont---you can ignore this.

Simply loading a MIDI file into SynthFont and then saving it fixes its BIAB-->PowerTracks stutters and drum issues for all Windows players.

You can download the stand-alone version of SynthFont, and its VST plug-in (which works just fine in PT2012), from: www.synthfont.com

Paj
8^)