When I first installed Notes 8 Beta I almost freaked when I realised Double Right Click to close a document/database/view etc was not supported. I searched preferences trying to figure out how to turn it back on. After a while I looked at the Notes 8 Beta discussion forum and found that it wasn't supported but Mary Beth Raven had committed to bringing it back.

But then why wait!!! Nathan Freeman has posted on how to bring it back now! That is what I call a righteous hack! Well done Nathan.