The final version of Lightroom 5.2 and the matching Camera Raw 8.2 are now available. Download Lightroom 5.2 (Mac | PC). Camera Raw should be downloaded via Photoshop.
Being the first dot release, there are a few new features.
Spot Removal now has a feather control, to let the user blend the edge of both brushed and circular spots.
Color Noise Reduction has a new smoothness slider to reduce blotchiness in over large areas-great for really high ISO images.
The source point for Spot Removal has been improved. It works better with texture, and now prefers areas inside the crop boundary.
Smart Previews are now 2560px
Auto Exposure has been improved
You can now Ctrl + Alt + Drag (Cmd +Opt + Drag on Mac) a Brush pin to duplicate it.
There is also a right click context menu for a pin to duplicate or delete it
Bug fixes include
Timelapse sequences can be exported again. Yay!!!!! I’ll do a post on this shortly
The bug with exports less that 1/3 size has been fixed. Major joy.
Full Screen scrolling through photos fixed
For the full list, and new camera support (including preliminary support for the new Olympus EM-1), go to Lightroom Journal.