Most people already know about this so for all you newbies.
After printing to tape I noticed an audio dropout that didn't show up when previewing on timeline. I reprinted and reprinted and...well you get the idea.
I also changed the video, slide the audio to try and rule out all possibilities. Nothing worked. I then decided to zoom in all the way on the timeline and check the position of the error. I had the smallest black frame, couldn't see it when zoomed out. stretched the video to the next cut, printed to tape and it worked fine. No droped frames.
Just a trouble shooting tip for all you newbies. I know how much time it takes to figure things out sometimes.
Steve