siasia/xsbt-proguard-plugin — pull request #21 by rob-p (2012-03-06 19:35:07+00:00)
Title: Updated plugin to use Proguard 4.7 

The current version of xsbt-proguard-plugin relies on proguard 4.6, which lacks support for Java 7. Thus, someone using JDK 1.7 is unable to use this plugin due to a class version mismatch. This prevents anyone on JDK 1.7 from successfully using this plugin. This commit updates the version of proguard used to 4.7 which adds support for Java 7 and resolves this issue.