Samsung SyncMaster 2443 not filling out screen We have a lot of Samsung SyncMaster 2443s at the office, when I connect my mid 2012 MBP 13" to one of them, the monitor doesn't display full screen, it adds a black border around it (1/2"  thick). All my co workers with similar MBP and MBAs do not have this problem, it also persists on all the screens i've tried so far (3 different ones). 

I've added a photo of the screen, it's like that all around. I can't find any setting on the screen or in system preferences to change it. I'm sure it has to be some kind of software problem, because when I reboot the display is full screen for a while, up to a certain point where I guess some OS setting is loaded.

I've tried resetting NVRAM/PRAM and removing the windowserver.plist files. My display settings are at 'best of resolution', but setting it manually to 1920x1200 doesn't matter.

Any clues on how to fix this?
In the mean time i've experienced the problem on multiple monitors. I finally committed to reinstalling my OS from scratch and that solved the problem for me. The problem is somewhere in the OS, but I didn't have any luck finding it.