Quote - moving to Linux would likely be a one way street

Heh... It was exactly the same for me. I forgot taking my Win CD and when it finally crashed I had no way to recover but to move to Linux - whic h I did. Now I`m thinking of re-installing LW (over Wine) to explore the structure of some obscure fragments of my ongoing animation proj (I used Blender to convert to C4D thus far).

Returning to the sequence problem: Bledner did not enclose audio in the projcet, despite choosing AAC... When tried Multiplex Audio (its description suggests it`s the option to choose) Blender disappears on render. Tried in 2.53, but the options are completely different (I think even from the descr you cited for 2.6 :0) When I re-loaded the 2.49b proj into 2.53 and set audio to aac (there was no coding set despite I chose AAC MP4 in 2.49) Blender 2.53 just spit a message that there is an "Error initializing Audio stream".

... Any suggestions?