3.4.1
* addresses an issue introduced in the Lightroom 3.4 and Camera Raw 6.4 release where, in very rare cases, JPEG files could become corrupted after editing the metadata in the file.
* also corrected another rare issue that could cause valid JPEG files to appear with incorrect color.

3.4
bug fixes, new camera support and new lens profiles.
http://blogs.adobe.com/lightroomjournal/2011/04/lightroom-3-4-and-camera-raw-6-4-now-available.html

3.3
bug fixes, new camera support and new lens profiles.
http://blogs.adobe.com/lightroomjournal/2010/12/lightroom-3-3-and-camera-raw-6-3-now-available.html

* Direct publishing to Facebook and SmugMug is now available
* Tethered capture now supports the Leica S2
* A larger list of corrected issues has been included as part of the Lightroom 3.2 Release Candidate notes. Additional issues have been address in the final Lightroom 3.2 update:

* Fixed authentication issues that could be experienced with the Facebook publish collection
* Adressed performance issues that could occur while reviewing images in Loupe view
* Corrected several Adobe Photoshop Elements upgrade issues
* Corrected a file renaming bug involving date or time fields
* Export with watermark will now function correctly when choosing the Limit File Size option

Library Module
DSLR tethering
Collection publishing
Extended metadata filtering
Revamped import is now a module
Video import
Catalog backup moved to end of session

Develop Module
Greatly improved raw processing & noise reduction
Lens corrections
Vignetting enhancements
Add film grain
Auto-masking eraser
Editable tone curves
Access to collections in Develop Module
Quick crop orientation change

Slideshow Module
Export slide shows to Video
Better sound control

Print Module
DPI expanded to 600 & 720
Custom picture packages
Add page background Color

ALL
Enhanced watermarking

* Additional camera support for several new camera models including the Nikon D5000 and Canon EOS 500D (Digital Rebel T1i)
* Includes several corrections for issues introduced by previous Lightroom 2 releases

What’s New in this Version
- Additional camera support for the Nikon D3X and the Olympus E-30
- Several corrections for issues introduced by the Lightroom 2.0 release

New in Lightroom 2.2
The goal of this release is to address bugs that were introduced with the release of Lightroom 2.0 and provide
additional camera raw support. A comprehensive list of issues fixed in this release is included below:

Lightroom 2 Bugs - Fixed
• Images rendered from the Slideshow export process produced a jagged effect on hard edges relative to
the quality of normal JPEG export
• Increased the number of characters allowed in Web gallery labels beyond 150 characters
• Catalogs with hundreds of root (top level) folders caused very slow launch times
• Drag and drop to move a subfolder to a different folder showed the incorrect photos in the grid
• Print Sharpening produced edge artifacts in certain conditions
• Density defaulted to 100 percent for initial stroke regardless of position of slider
• The Adjustment brush created blocky, straight edges to brush strokes under certain conditions
• Lightroom could become unresponsive when using the graduated filter under certain conditions
• It was possible to lose the ability to edit an adjustment brush setting after applying a graduated filter
with hidden pins
• Turning auto-mask on produced a lag in Lightroom performance in when applying the adjustment brush
• Print to JPEG functionality produced a low resolution image when printing photos with panorama aspect
ratios
• Extended characters in a folder name caused Edit in Photoshop functionality to fail
• Smart collection did not respond to changes in custom metadata
• Enabling auto-mask produced a lag in performance in when applying the local adjustment brush

Lightroom 2 Enhancements
• Camera profiles are now available in the Calibration panel in the Develop module. These profiles are
designed to provide different interpretations of raw capture.

Newly Supported Raw File Formats:
Canon EOS 5D Mark II
Canon PowerShot G10
Panasonic DMC-G1**
Panasonic DMC-FX150**
Panasonic DMC-FZ28**
Panasonic DMC-LX3**
Leica D-LUX 4**