Lightroom 4.2 Release Candidate Available on Adobe Labs

As is often the case in advance of an official release, Adobe tonight has made available a “release candidate” of Lightroom 4.2, available for download from Adobe Labs. The release candidate has been tested by Adobe testers, but they are now seeking broader user experience and feedback before finalizing 4.2.

This RC contains several bug fixes, as well as support for several new cameras. If these bugs are significant issues for you or you have one of these new cameras, I would update to this RC. Otherwise, I would suggest waiting for the official release. For those of you who have been experiencing performance issues with Lightroom 4.1, the list of bug fixes released below does not include any fixes for these issues.

New cameras supported:

Canon EOS 650D / Rebel T4i
Canon EOS M
Fuji FinePix F800EXR
Leaf Credo 40
Leaf Credo 60
Panasonic DMC-FZ200
Panasonic DMC-G5
Panasonic DMC-LX7
Pentax K-30
Sony DSC-RX100

Bugs fixed:

Folder stacks with virtual copies get unstacked when moving to another folder
Stacked photos get hidden in both the Grid view and Filmstrip. This occurs when photos get unstacked as a result of enabling auto-stacking.
Errors encountered when publishing videos to Facebook through the Facebook Publish Service
Users may have occurred problems when trying to enter the Web Module from Library.
Unable to edit JPEG photos in Photoshop Elements
Unable to upload files to Flickr if there is a carriage return in either the Title or Caption fields (Win only).
Background graphics that are applied to a Book globally may not appear as expected in a Saved PDF.
Certain book covers had spine text positioned in a Horizontal manner, not Vertical.
Double byte characters are not being exported to PDF in Books
Photos were exported with original GPS coordinates recorded by the camera, not with the GPS coordinates updated in Lightroom.
Keyboard shortcuts in the Develop module sometimes do not work when editing an image in Process Version PV2010.
Parents and synonyms of “do not export” keywords also do not export.
Audio does not play in video files after creating a slideshow containing music (win7 only)
Tether support not working for Nikon D4, D800 , and D800E (win only)