Problem: When you export a movie file from the Premiere, you see jagged lines. See the example below.
Solution: When you export the video, set the field order to None (Progressive).
If your source is interlaced and you want to make a dvd or bd you leave it interlaced.
The old fashioned dv camera is lower. HD is always upper. Going from HD to DVD is also upper.
If you are exporting for pc, web, Youtube etc. you export progressive.