Audio and video clip lengths differ in encore timeline

Hi
I have been working to build a BD-R H.263 ac3 disk.  I used AME from within Premiere Pro to export the M4V and (at the same time) AC3, using the present defualt parameters-no tweaking of any setting.  The clips appear to play great on encore's monitor--everything in sync.And on the burned BD-R
However, I am getting the black screen between clips in the timeline when played in the standalone BD player, or (when I had one clip to a timeline) in a playlist.  a previous poster made note of different length audio and video clips.  I zoomed on the timeline and lo and behold--the  the audio and video clips are different lengths.
This is with the timeline fully expand--each division is a frame. Note that break between the two audio clips is offset from the break between the two video clips by two frames.  This offset is after several clips.  I could find no information on what the one frame crosshatching at the end of the leading clips means.  Can anyone explain this cross hatching?  What do I do about it?  the image below is after the first clip in the timeline:
In this image, the offset is less than a full frame??????
I tried using the trim tools to bring these together-but, the trim tool only lets it jump a full frame and then only to a GOP boundary, which doesn't help because the boundaries are obviously different fro the video and audio track.
I want to emphasize that these assets were created from the Premiere CS4 timeline (which had no offset between audio and video) using the default H.263 and AC3 presets in AME and the same presets selected in Encore.
The offsets do not appear to cause the actual audio and video to go out of sync when I play the burned disk. But, I get the 1-2 second wait between menus and chapters, or with items in a playlist.
The audio offset suggests that the player may not know what to do when faced with a chapter point that is different on the audio and video tracks, although, I will note that encore snapped to the joints in the video track not the audio track.
You can see from this listing that several of the clips audio and video lengths that differ by one frame.  By the end of the timeline, the cummulative offset is 3 seconds (48 minute timeline)
Can anyone shed any light on this?  Thanks

I don't think that I had the same problem that you do, but I thought I'd throw in my two cents just in case it might help. Encore would not build the output; it said something like the inpoint and the length did not match the endpoint. Actually, I think this happened in several different situations. In one case I simply adjusted the audio and video tracks to match endpoints. In the other case I went back to Premier and found that in some cases where I had added transitions it had shifted the endpoints of the audio and video tracks so they did not match. I removed the transitions. It didn't matter that much to me since I'm doing this for personal use. Is it possible those crosshatched lines you're seeing are transitions?
I am using CS 3 and editing HD. I have had many problems with encore. I read in the form someplace that it had a hard time handling H.264 so I changed to MPEG-2 and that fixed one problem. In another case it couldn't find some files and I found some advice not to use HD or wide menus, so I switched to standard 4:3 menus and it worked.

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