Faith Magazine has been campaigning for over 30 years on this issue. As a priest and a Latinist, I am appalled that my people have been deprived for so long of the content of the Church's prayers. Here's an example:
accipiens et hunc praeclarum calicem in sanctas ac vererabiles manus suasActual meaning:
taking also this glorious chalice into his holy and venerable handsCurrent ICEL translation:
He took the cupOh, I'm really so attached to that!
(See also Fr Stephanos' great caption to a photo of Pope Benedict.)