Mac Mini Casing Turning Yellow / Beige

I have three Mac Mini Intels, two at work and one at home.
The one at home which was from march 2006 is white, the brand new one at work is white, but mine at work which is from around May has turned Yellow, an ugly ivory colour on the top, when the white remote is put on top, it is a totally different colour. Has anyone else got this?
I can only assume it is the daylight or flourescent tube on the ceiling above affecting the plastic.
Not very pleased about this.

I haven't noticed any significant discoloration in my mini's, though when compared to a 3rd generation iPod, both look slightly yellowish. I have one in my office under fluorescent lighting, and one at home in daylight/partial sunlight but both look the same color, and both match a brand new mini I set up for a user.
The only mini I have seen show any real sign of discoloration was used in a smoking environment, where not surprisingly it turned a rather unpleasant shade of yellow.
Is it possible that there are trace chemicals or impurities in the air in your office that may have affected just that system?

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