Strange problem at the moment. I've exported DSLR footage and audio from Premiere as H.264 - works fine - its my usual export and one I'm allways happy with for most uses. No sync problems, but some black footage (or blank footage).
When I import this into Premiere again, the black footage seems to be removed and thus the audio is completely out of sync. Any thoughts?
I'm inclined to say observer/operator error here. I don't believe it's possible for PP to do as you claim, so I'm skeptical of your conclusion.