LightroomNews » From Beta 4.1 to Version 1.
lightroom-news.com/2007/02/03/from-beta-41-to-version-1
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
A lot has changed in the few short months since Beta 4.1 was released. Here’s a list covering some of these changes. It is by no means a comprehensive list, but should whet appetites for this information: