Corrected a bug where the crop overlay resized incorrectly when used with the "Constrain to Crop" checkbox.

The update focused heavily on expanding hardware compatibility and fixing legacy bugs:

The "RUS" designation refers to the inclusion of the Russian localized interface, making the advanced Photo Book and Geotagging Map modules fully accessible to Russian-speaking users. Critical Bug Fixes

Added correction profiles for various lenses to automatically fix distortion and vignetting, specifically fixing an issue where the Sony RX-1 profile lacked vignette information.

A major highlight for Fuji users was the improved demosaicing algorithms for X-Trans and EXR sensors (found in the X-Pro1 and X-E1), which significantly reduced artifacts and improved image quality.

For users with older hardware or those avoiding subscription models, Lightroom 4.4 represents one of the last "buy once" versions that supports . This engine introduced the powerful "Highlights" and "Shadows" sliders that define the modern Lightroom editing experience. Lightroom 4 Review - DPReview