The IronRuby team is pleased to release version 0.9.1! http://ironruby.net/Download Direct download link: - http://ironruby.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=30916#DownloadId=85513 As IronRuby approaches 1.0, these 0.9.x releases contain important bug fixes and enhancements that IronRuby users request; this release fixes 30 bugs, including fixes for running Cucumber and Rails, and significant performance improvements on constant lookup. For more information see the "Bugs fixed and changes" page for this release: http://rubyforge.org/frs/shownotes.php?release_id=39609 This release also contains a significant improvement to running IronRuby in the browser with Silverlight: placing Ruby code in HTML script tags. For more information, read the Back to Just-Text with Silverlight write-up: http://jimmy.schementi.com/silverlight/sl-back-to-just-text.pdf As always, if you encounter any issues with IronRuby please report it on the IronRuby Issue Tracker: http://ironruby.codeplex.com/WorkItem/Create.aspx