User blog comment:DaNASCAT/Technical Update: May 22, 2012/@comment-13301-20120522182326/@comment-1656630-20120522183318

Most of the improvements are things not immediately obvious: resolved bugs, improved indexing time, faster backend performance, better result relevance in many situations. The foundation that makes a stronger path forward possible.

We're also responding rapidly to requests and issues identified as we go, and unfortunately, some changes have been buggy.

It'll clear up soon, and quality will be overall improved from where we started. We thank you for your patience.