SBT version 0.7.5 RC0 has been announced. The 0.7.5 launcher now uses Ivy 2.20, and defaults to Scala 2.8.1 and SBT 0.7.5 for new projects. SBT 0.7.5 RC0 has been updated to work with Jetty version 7.2 WebAppClassLoader binary incompatibility, and configuring jetty-env.xml and webdefault.xml are allowed.