We reported on the Retina Display-powered MacBook Pros from Apple, where some have been experiencing screen ghosting issues, as well as the resolution of the screen itself not running at the advertised 2880x1800. But now Apple have published a FAQ on the matter, dealing with questions regarding the rMRP's.
Within the FAQ, Apple mentions a fix for some programs that aren't running in the high-resolution mode, tips for working with multiple displays, and they address concerns over Boot Camp and other multi-boot environments. It will be a while until more program support the 2880x1800 res, so until then there will be situations where some programs look weird, or have odd artifacts.
Apple also recommends running games at 1440x900, and not the screens Retina-busting 2880x1800, if you're experiencing issues running alternative resolutions. There aren't many games that are optimized for the Retina display, apart from Diablo III. Diablo III supports 2880x1800, but has some frame rate issues, something Apple have said will be addressed in a future patch.
Apple's stock settings for the rMBP don't include the full 2880x1800 resolution because most type and other display elements would be too small to read.