this is a recent problem that's popped up for me - at first i had no problem getting 5.1 from dvd content using handbrake and then streaming to my Apple TV. But now I can only occasionally (1 out of 10 tries) successfully get the 5.1 track streamed to my Apple TV (i get prologic instead). The first few (successful) encodes still play with 5.1 but anything i've encoded recently with handbrake (even though i selected the 5.1 track and used AAC+AC3 output) plays as prologic. i have tried troubleshooting this with no clues....i will occasionally get a 5.1 track from certain discs but these encodes take so long this is a hard one to troubleshoot! any help appreciated!