Okay I've never had any issues with Encore CS5.5, but most of my experience is with HD video so I could be missing something simple...
I built a Premiere Pro project and Adobe Dynamic Link'ed it over to Encore, created the menus etc and everything is great. Check Project finds no issues, it Previews perfectly. But when I burn it to the disc, this:
(screenshot taken directly from the "Preview" window)
Once on the DVD, I place the DVD into a DVD player and it comes out like THIS:
(Picture of DVD loaded in DVD Player/TV, where for some reason it has cut all of the corners)
I tested it with multiple TV's and DVD players.... Having not worked with SD videos in Encore before... is there something simple I'm missing?