Thin Black Line going halfway across the top of the screen

Hi - I've exported a sequence from FCP. It's DV Pal 720x576 anamorphic 16:9 lower field dominance. I used compressor to create the mpeg 2 file for DVDSP. I used the Best Quality DVD 150 min setting. The problem I'm having is that when I export the file from DVD studio pro I get a black line going halfway across the top line of the video. I suspect it's either a deinterlacing issue or a field dominance problem. But I'm really stuck on how to sort it. Any ideas would be really appreciated. Thanks very much.

Something like this?
................................................................................ ........... (might also be mirrored horizontally)
That's the Half Line Offset and is a characteristic of interlaced video, not an issue or field dominance problem. It's quite complicated to explain and probably not surprising if you have never seen it before as it won't be visible on a regular TV set.
Short article here: http://lipas.uwasa.fi/~f76998/video/modes/ Look at the section "The "active" part of the signal". There's probably plenty more on the web, now you know what it's called.
What can you do about it? You will need to view FCP's output on an external interlaced monitor that is capable of displaying in underscan mode so you can see it.
Then you can use the crop controls to snip it off.

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