How many of you have experienced a PowerBook display failure, characterized by half of your screen being dimmer than the other? Over in the Displays category of Apple Discussions, there are a lot of 15" Aluminum PowerBook users that have had this Uneven Illumination problem, myself included; after a few weeks or months of usage, half of the screen (usually right half and bottom-right corner) becomes noticably darker than the other half. This is very noticable when the Brightness is not turned all the way up, and especially on a white background. To test your display, turn down the Brightness (even just two or three bars will do), then open up and resize a TextEdit windowm to cover the whole screen. Many users are initially unsure if the uneven illumination is a problem. Here are some comments I've seen: - "It's only noticeable on a completely white background." - "I don't see it if the Brightness is all the way up." Those uncertainties, combined with that fact that the standard Apple background (the blue Abstract with the "swish") has a dark gradient at the bottom, probably means there are a lot more people with this problem that don't realize it's a problem! There are a number of reports from people that have had their screens replaced twice already, and the problem is still reocurring. The "Uneven illumination" threat at Apple Discussions is informative. Apple's increasingly attrocious customer service is not reassuring, for anyone. Apple Support has been largely unhelpful, and sometimes rude and accusatory. There has been no official information about the cause of this issue. Apple hasn't acknowledged it as a problem. But professionals like myself--Graphic Designers, Web Developers, etc.--and other prosumers deserve to have these issues addressed candidly. We've payed $2,000 or $3,000 for our PowerBooks, and for that price they should work. If repairs are necessary, so be it; but the technicians need to identify and replace the defective parts instead of blindly swapping out screens.