Adobe has released a release candidate of Lightroom version 4.1 onto Adobe Labs. This adds camera support for the Canon 5D Mark III, and deals with several issues in the original 4.0 release. Crucially, it corrects a bug that prevented Lightroom 4 from properly opening external applications when using the “Edit In” functionality, restores point curve adjustments made in Lightroom 3, addresses performance issues in Lightroom 4, particularly when loading GPS track logs, using a secondary monitor, and the controls within the Develop module, restores the ability to update DNG previews and metadata for more than 100 photos and improves the viewing of subfolders and stacks in folders with a large number of photos.
Lightroom 4.1 release candidate is available now as a free download, and will expire on 30 June. Release candidate status means that the version needs additional user testing before being issued as release.