I think the release message for version 4.6 update pack 1 in the News forum has been misposted. That sales pitch should probably go to the web site, and the real release message that specifies what changes went into the new version got stuck somewhere else. Hopefully we can get the correct text back soon.

All changes between origilally released 4.6 (build 4613) and 4.6.1 (build 4624) are included into 4.6.1.