The PS 3's HDMI output is locked due to HDCP. the easiest way is to switch to component cables. most games on PS 3 are natively rendered at 720p, and if you have it set to 1080i or 1080p, the system is just really up-scaling the picture to fit the display resolution.
1- it's on default settings.
2- not sure if this is it, but there doesn't seem to be any interference from anything else here.
3-same as 1. default. i'm on US standard.
4- there isn't any problem with the pass through to the TV. that works fine. it's the signal that's being sent from the device's USB to my pc that produces that image.
also working on a support ticket..