I haven't got a FLU but there was a topic a while back where a few people were experiencing darker colours in general on the FLU models suggesting that the FLU's screen is modified so the light to screen is balanced but it hasn't been done well. The regular gp's screen is very good in normal light anyway (far better than GBA's) and ok you can't use it in the dark, but sooner or later a afterburner kit will be released, and though it requires the opening of the unit, its pretty much gaurunteed to produce better results. Cheaper too.