Lightroom 3.4 and Camera Raw 6.4 are now available as Release Candidates on Adobe Labs. Lightroom 3.4 and Camera Raw 6.4 Available on Adobe Labs « Lightroom Journal Added support for: Canon EOS 600D (Rebel T3i / Kiss X5) Canon EOS 1100D (Rebel T3 / Kiss X50) Hasselblad H4D-40 Olympus E-PL1s Olympus E-PL2 Olympus XZ-1 Samsung NX11
If you don't own any of the listed cameras and none of the fixed bugs annoys you, using the RC won't make much sense for you. However, I used the first beta version and the second beta version of Lightroom 3 and some of the release candidates. All of these versions worked very fine and stable. I would not be afraid of using this, because it is a release candidate.
Can you use the 3.4 release candidate and then upgrade to the full 3.4 release once it's out, without problems???
Update on Lightroom 3.4 - bugs fixed and new camera support - including the Fuji X100 Thanks to my obsession over the Fuji X100, I checked out Fujifilm Finepix X100 News & Rumors a few minutes ago...as a way to stave off my impatience...and found that indeed the new Lightroom update is available. Here is the link from Adobe, thanks to X100 News & Rumors.