Am I correct in assuming that the 'new' BT1 filetype is the default for both RealDrums and RealTracks?

I copied my RDs and deleted the BT0s and then generated the 'new' BT1s by playing a songs with the appropriate drum and tempos. So far no problem. However, when loading songs with Multistyles that worked in 2010, silent drums. The only fix was to delete the BT1 and copy the 'old' BT0s back into the RD folder.

Anyone else had problems with the new BT1 and multistyles?

R