So far I've hit two songs (I think) with other than Standard/Drop-D tunings. One is an Eb tuning (all four tuned flat) and one I didn't catch but just the E and A strings were changed (E at Drop-D I think but A was also retuned).
The lower tunings are still a problem though with recognition. Hitting the (now)D too hard kicks it up to +2 and if you tune it down a little, it ends at -1 or -2 and neither are recognized. I've gotten into the habit of strumming a sustained note to keep it at 'D' and lightly hitting the lowered tuned strings. Kinda takes the funk out of it though :-/