I have the same Problem!
Seems to be right, that the error showed up after update to 5.02.
I worked arround doing a "wav" audio file of the whole sequence, then it worked.
But thats no solution for long, hope they will rollout a new update and resolve the bug.
I meantime does any one have a better solution? I tried to download the update 5.02 from the adobe website and install it, but the error is still the same. Possible that this fix from the previous poster worked only when premiere is fully deinstalled.
Welcome to the forum.
This might be a good place to file a Bug Report. Adobe takes those very seriously. Be sure to provide all details, so that Adobe can reproduce the issue in the lab.
Can you clarify what your problem is?
Is it that you need the 5.02 update to fix the AIFF sync issue, but that then breaks Media Encoder?
If so, you'll need to re-install Media Encoder. For me, this was choosing Premiere on my CS5 installer and deselecting everything except Media Encoder, but it seemed still to revert Premiere to v5.0 so I then had to run the *downloaded* Premiere 5.02 update.
Do not allow the Adobe Updater to update Media Encoder or you'll hit the same problem again.
If your issue was actually something else, then let me know!