[grivel]

Confirm if I am correct then RAIL:

From PT WIN 6.4:
SAVE SESSION COPY IN [Choosing BWF(*.WAV) as File Type]
Pro Tools 5.0 Session (*.pt5) - all audio will be converted to WAV(*.WAV)
Pro Tools 4 24-Bit Session (*.p24) - all audio will be converted to WAV(*.WAV)
Pro Tools 4 16-Bit Session (*.pt4) - all audio will be converted to WAV(*.WAV)

Notice audio is NOT converted to BWF(*.WAV) since PT 4 & 5.0 cannot read this.

From PT MAC 6.4:
SAVE SESSION COPY IN [Choosing BWF(*.WAV) as File Type]
Pro Tools 5.0 Session (Don't know the file ext.) - (Same as above WAV(*.WAV)
Pro Tools 4 24-Bit Session (") - (")
Pro Tools 4 16-Bit Session (") - (")
Pro Tools 3.2 Session (") - (")

Is this correct Rail?