Comments Lightroom 3.4 and Camera Raw 6.4 are now available as Release Candidates on Adobe Labs. The ‘release candidate’ label indicates that this update is well tested but would benefit from additional community testing before it is distributed automatically to all of our customers. The final releases of Lightroom 3.4 and Camera Raw 6.4 may have additional corrections or camera support.
More details on the Lightroom Journal blog.