SCons 0.97 is now available as the first "stable" release since 0.96.1. 0.97 has been preceded by a long development cycle with numerous testing pre-releases, and contains significant accumulated features and fixes. If you upgrade from 0.96.1 (or an earlier release), BE SURE TO READ THE RELEASE NOTES for important information about potential configuration changes and rebuilds. Download it directly from the download page at SourceForge.