While bibble had very good color before, some folks noticed that the images had a bit of a red tinge to them. That cast is gone, and bibble is now delivering its best most vibrant color ever.
White balance has also been enhanced. Not only can you override the cameras selection of one of the 6 basic settings, you can also further modify that setting up or down by 3 'clicks' in each direction (Just like on the camera). With this enhancement you have 36 different WB settings to choose from with color temperatures ranging from 2750K all the way up to almost 8000K. This makes it even easier than ever to worry about WB after the fact.
The colour tweaks should make it into the Mac version next week.