Just days after the release of webtrees 1.1.0 the development team recognised that it contained some defects that had been missed during testing and early reviews. These caused a significant deterioration in performance, especially on sites with large family trees.
But, these things happen, and the response has been rapid. Just 6 days after releasing 1.1.0, the team have released its replacement, version 1.1.1, which fixes all the identified performance issues. Speed is now dramatically improved, well ahead of any earlier versions.
Note: All kiwitrees client sites have been immediately upgraded.