This known bug in CS6 has been well documented regarding the
potential symptoms, known issues and transcoding workarounds.
Audio and Video glitches | AVCHD footage
It would also be very helpful for CS6 users to be able to specifically
identify the problematic cameras and/or media types in order to make
informed decisions when purchasing a camera, or when receiving
media files with the intent of editing in Premiere CS6.
If there is a definitive list of specific camera manufacturers / models,
and/or media types that are affected by this bug, I have not been
able to find it.
Of course this bug has been resolved in the June 17th
release of the Creative Cloud Subscription update.
It remains to be seen if the fix will be back-ported to CS6.
Thanks.
