A couple of times previously, we have mentioned problems with the Apple Multiple Scan 15 Display. These problems are common enough that Apple has apparently adopted a new policy that makes it easier for users to get their defective monitor replaced. The word I have from an anonymous source is that any Multiple Scan 15 Display with the following symptoms will qualify for a factory-refurbished replacement monitor (regardless of warranty status): Color hue reverts to faded blue, pink, green, or yellow. Meanwhile, Apple is still trying to determine the exact cause of the problems.
Update: This policy shift probably does not apply to European versions of this monitor - which apparently is a different monitor despite the same name - and which has proven to be more reliable (Thanks, William Tyler.)