Ok this is REALLY rediculous!
Lightroom is automatically (without input from me) changing photos to black and white.
You change them back to color and then it starts changing more and more to B&W! It gets quicker and quicker! It destroyed a whole 30,000 image library! 
NOT impressed.
Reverted back to (what I think) is a decent library from my old machine.
Lets hope Adobe fix it quick or 2.2 doesn't do it otherwise Im stuffed 






