After months of trying to get a good newsletter out of the default newsletter functionality of DotNetNuke, I found a separate newsletter module from Orizonti that looks great.
After installing 4.5.2, I wish that I hadn't. But with the 4.5.3 upgrade, the search and the syndication of articles is now running for the first time in the history of the new site.
The latest version of DotNetNuke 4.5 has been released and we updated the site today. We will continue to monitor the stability and new functionality.