Why does meltwater taste different?
(not yet a fully grown answer: experiment still pending)

I heard that $\ce{CO2}$/$\ce{H2CO3}$/$\ce{HCO3-}$ is responsible for "fresh" taste of water.

@NickT: Chloramine has a very characteristic smell, so Manishearth could most probably tell us whether this was the smell/taste.

So, here are first questions for @Manishearth:


does water that has been boiled and then cooled to the same temperature taste similar to the taste you're asking for?
What about de-ionized water?


Of course, there's also that average-of-all-that-has-ever-been-in-the-freezer taste...