Looking through the options, I saw "full pixel mode" as something you can enable/disable. What exactly does it do?
From this article:
There's also a "full pixel" mode that liberates the PS3 version from the borders of the original game, giving the game much more real estate on-screen - boosted all the more by the move from the original's 4:3 aspect ratio to the full 16:9 widescreen experience.
It also seems to eliminate overscan, giving the sharpest possible picture on an HDTV.