We started to implement WCAG 2.0 check functions. Currently, however, this function is experimental. We'll continue to improve quality of check functions in next release.
In some cases, it took a long time to finish usability visualization. We analyzed bottlenecks, and refined several items related to HTML Parser implementation and usage of XPath evaluation. (see bug 281318)
We focused to find and fix bugs. Several bugs were fixed in this release.