Wrkit, You say sometimes the new style will not play. If you mean that tracks are silent (as opposed to the old style just keeps playing instead of the new style), then I think I know what you did. A particular track can only be MIDI or Real Tracks, not both. If you are mixing the two on a track then the MIDI part won't play.

Clif gave a good reply about what the Clear .STY button does -- it erases changes to the style that you made at that particular bar.

Jim