[M4IF Technotes] Is it a bug in the reference software?

[Lefan Zhong]

Hi folks,
I traced Microsoft MPEG-4 reference software and found that it wouldn't allow a packet end with stuffed macroblocks since it doesn't check resyn_marker during mcbpc decoding, it may take the resyn_marker of next packet as mcbpc to decode.
Momusys software checks the resyn_marker.
Questions:
1) Does anyone know that MPEG-4 spec doesn't allow a packet end with stuffed macroblocks?
2) Is it possible a bug in MS reference software?
3) Has any company generated a bitstream with this feature for conformance testing?
Thank you for your time.
Lefan