Adobe has released a Lightroom 1.4.1 update which is a replacement for the 1.4 update retracted mid-March due to the discovery of a major bug involving the EXIF time stamp.
Also released was a Camera Raw 4.4.1 update replacing a similarly retracted 4.4 update.
These latest releases provide all of the changes included in the original Lightroom 1.4 and Camera Raw 4.4 releases but also include corrections for other issues.