[Calgon]

They probably forgot to include something and had to release a quick update. In the public BETA (if you noticed), the updates were entitled 'Release Candidates':

Quote:

Originally Posted by Wikipedia The term release candidate (RC) refers to a version with potential to be a final product, ready to release unless fatal bugs emerge. In this stage of product stabilization, all product features have been designed, coded and tested through one or more beta cycles with no known showstopper-class bug.

Then it was taken out of the RC stage, now each update is deemed as a release (that's what the 'R' now stands for). I think.