1. launch terminal
2. type or copy/paste
defaults -currentHost write -globalDomain AppleFontSmoothing -int 2This will give you antialising with medium fontsmoothing. Found this on another forum and it fixed my issues with barely legible white text and black backgrounds. You'll also know this is working by going into your Appearance panel and noting that the 'Use LCD font smoothing' checkbox now has a horizontal line through it.