are you using a laptop with insert above print screen, but on one button?
if you are, try pressing the Fn key and then print screen, it had me stumped for ages on my old laptop :/
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Sat 9 Aug 2008, 17:59,
archived)
same here,
My workmates now like to refer to it at the "Effin' key"
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Sat 9 Aug 2008, 18:02,
archived)