The Nokia toolkit generated PDU has an extra CR/LF pair of characters on the end of the DRM package (hex 0d 0a). The Encapsulation spec I have says that a DRM FL envelope ends with 2 - characters, so...

Content Publishing 2.0 Toolkit suggests one of the MIME-Types for a MP3 file as audio/mpg3 which is AFAIK not a standard or known MIME-Type.
Was it intended to audio/mpg or audio/mp3 but ended up...

I think the questioner means is the boundary-parameter of the content-type mandatory, not the boundary delimiter itself. Referring to OMA Forward Lock(2003-04), it quite clearly states that the...