Hi, lxml 2.0.11, 2.1.4 and 2.2beta1 are on PyPI. The first two are pure bug fix releases for a crash bug that can occur when using a single XPath evaluator concurrently from multiple threads. lxml 2.2beta1 adds a couple of further fixes to this. Changelog below. In its current state, I consider lxml stable and mature enough not to require separate long-living release branches. The current release is the end of the 2.0 series. Unless we find major reasons for users not to switch after the release of 2.2 final, 2.1 will soon go out of maintenance. Stefan 2.2beta1 (2008-12-12) Features added * Allow lxml.html.diff.htmldiff to accept Element objects, not just HTML strings. Bugs fixed * Crash when using an XPath evaluator in multiple threads. * Fixed missing whitespace before Link:... in lxml.html.diff. Other changes * Export lxml.html.parse. 2.1.4 (2008-12-12) Bugs fixed * Crash when using an XPath evaluator in multiple threads. 2.0.11 (2008-12-12) Bugs fixed * Crash when using an XPath evaluator in multiple threads.