hab ich 5.1 verpasst
Wieso direkt 5.2?
EDIT: Klaus, es gibt doch Bugfixes und Neuerungen:
The following new Features have been added in Lightroom 5.2 RC:
•A Smoothness adjustment slider has been added to the Detail Panel under Color Noise Reduction. This helps to reduce low-frequency color mottling artifacts
•Refinements to the Spot Healing Tool:
•New Feather control
•Auto find source method now works better for images with textured areas like rocks, bark, and foliage
•Auto find source method now prefers source areas within the crop rectangle
•Smart Preview size has been updated to 2560 pixels on the long edge.
•Refinements to the Local Adjustment Brush:
•Right Click (PC) / Control-click (Mac) on a brush adjustment pin to bring up a context menu to duplicate or delete
•Control+Alt+Drag (PC) / Command+Option+Drag (Mac) on a brush adjustment pin to clone (duplicate) that adjustment
Fixed Issues
The following issues have been fixed in Lightroom 5.2 release candidate:
•Catalog containing images processed with PV2003 were adding a post-crop vignette when catalog upgraded to Lightroom 5.
•Pressing the "Reset" button while holding down the Shift key caused Lightroom to exit abruptly.
•Output Sharpening and Noise Reduction were not applied to exported images that were resized to less than 1/3 of the original image size.
•Incorrect photo was selected when trying to select a photo in segmented grid in Publish Services.
•The Esc key did not exit the slideshow after right clicking screen with mouse during slideshow playing.
•Import dialog remained blank for folders that contain PNG files with XMP sidecars.
•Metadata panel displayed incorrect information after modifying published photo. Please note that this only occurred when metadata was changed after the photo was published.
habs gerade installiert und das Problem mit dem Rauschen ist behoben. 
aber ein 5.1 Version habe ich auch nie gesehen
dann 
und morgen müsste es auffe Platte sein. Irgendwas ist mal wieder mit der Leitung 