I have a macbook pro and when I connect it to my external ASUS VH226H, 1920x1080 22" moitor all the fonts except the ones that are part of the OS not in external software are really blurry and rubbish. I've used the following apps and it all looks terrible: Coda, Firefox, Safari, Adium, Adobe CS5. I've tried changing the font smoothing options via terminal and it has made no difference.