I have create a project consisting of DV-PAL AVI's (Video & Audio).  If I then try and import this veg file into another project, the audio doesn't play.  I have a similar project with an mp3 music sound track with overdubbed voice from the DV-AVI file.  Again when imported into another project, the DV-AVI audio doesn't play although the MP3 music track does.  I have also noticed that sometimes I get an error saying can't read from stream whil creating audio proxy.  I am using a delta66 ASIO2 card.
Update:  This only happens with AVI-Type 1 files.  AVI-Type2 are ok.