Why Do Some CDRs Smell Like Almonds?

bertok asks: "I have several spindles of CD-Rs of various brands that I use at home and work, and some of them have a very strong almond odour when opened. Does anyone know what causes that? I know that Hydrogen Cyanide has a distinctive almond odour, but so does a range of other organic chemicals. Can any Slashdot readers with a chemistry background enlighten us as to the possible source of the smell?"