According to [this page](http://developer.android.com/guide/developing/tools/proguard.html), ProGuard shrinks, optimizes, and obfuscates your code by removing unused code and renaming classes, fields,…
most people aren't running 2.3 (gingerbread) - if at all possible and you aren't using any specific 2.3 apis, can you make the target version lower (preferably 1.6+?)