http://labs.adobe.com/wiki/index.php/Lightroom_2.3 Bugs - Fixed In the Windows 64-bit version of Lightroom an sFTP upload process could cause Lightroom to crash. Slideshows could return to the first image randomly during playback. A memory leak could cause Lightroom to crash while attempting to process files with local adjustments. Canon EOS 5D Mk II sRAW files could process with artifacts in Lightroom 2.2. Lightroom 2.2 could cause disc burning to fail for Windows customers. Camera Support Newly supported camera models include: Nikon D3X Olympus E-30
Re: Lightroom Release Candidate 2.3 Available (Camera Raw 5.3 RC also available Are these release candidates usually pretty reliable? From what I read they appear to be at a higher level than a beta, but maybe that is just my impression.
I think it goes: Alpha Beta Release Candidate (they are usually incremented...RC1, RC2, RC3, etc) Gold Master Candidate Final