my own rips,divx 5.05 with ac3 that were cut with avi-mux.
if i cut with vdub there is no problem joining them,but if i use avi-mux i get 'the audio steams have different data formats' so they cant be joined.

havn't tried it yet,but the only way that i see it can be done,save the wav for both cds and find some wav joiner.
save both cds with no audio then append them with the joined wav.
is there a easier way?