I got my RasPi a few days ago and used the older Debian image on my LG 22LG3000 TV and the picture was crisp and sharp and filled the screen entirely with nothing missing. The TV was in 720p mode which is as much as it can do.
Today I installed the newer Debian image (April 19) and now I have a black border approx 1 inch at top and bottom and approx 0.25 inch at left and right. This is during startup and also after 'startx'. The TV is still in 720p mode. Text now looks a little 'blurry'.
I have read all the forum threads about overscan/underscan etc. but to be honest I really don't understand them!
What can I do to get the display back to what it was on the older Debian image?