I am on my first replacement imac and there is still some yellowing on my screen. Not as bad as my first but it is still there. It doesn't really affect me but someone else in my household may be doing some graphic design so it could become an issue. I need the computer now and will be going on holiday very soon. When i return i will be out of the normal return period. I'm assuming this is covered under my applecare? I'd assume it is but just want to make sure.