Display changed/overscan not working after most recent update
After I did the most recent update for what I assume was Leopard 10.5.7, my resolution and colour quality changed. Now with overscan on the picture is cropped and the dock is almost out of view when I hover over it, and with overscan off there is a black gap of about an inch framed around my screen. The only change ocurred after I reset the computer post-update. I tried re-installing the update and messing around with the cable connection to no avail.
What are the odds that it was the cable? Is there anything you know of to roll back updates? Has this happened to anyone?
Mac Mini 2008, Mac OS X (10.5.7), 42" LG plasma TV as display using DVI to HDMI cable.