Adobe says the Lightroom 3.4 and Camera Raw 6.4 updates are available for immediate download on Adobe.com.

Originally posted as release candidates on Adobe Labs, the final updates bring raw file support to 13 popular camera models including Canon EOS Rebel T3i, Nikon D5100 and Fuji FinePix X100, and add over 25 new lens profiles to help photographers automatically correct unwanted distortion and chromatic aberration.
 
In addition, the updates address a number of issues reported by customers on the previous releases. The Lightroom 3.4 update is available as a free download for Lightroom 3 customers, and the Photoshop Camera Raw 6.4 plug-in is available as a free download for Photoshop CS5 customers. For more information and to download updates, visit http://www.adobe.com/downloads/updates/ .