iMovie3 export poblem

[Humberto O. Martinez,MD.]

I was so happy to see that iMovie 3 could export directly to MPEG2 when 
choosing the EXPERT Quicktime settings, thus bypassing the need to 
export first as a Quicktime movie file. I found that the export ended up 
with a defective AIFF sound file which only included the soundtrack of 
the first segment of the movie (30 seconds) which consisted of an 
imported DV file. The rest of the iMovie's soundtrack was bypassed and 
never encoded (9 minutes worth). I found then that if I exported the 
entire movie as a DV or MOV file ( like I always had to do with the 
previous iMovie versions), it would then encode it as a complete MPEG2 
and AIFF file. Is this a bug in iMovie 3?
Thanks
Humberto Martinez
Coral Gables, Florida