I get always with ProGuard following error:
[2012-05-19 17:50:13 - xxx] Warning: there were 13 unresolved references to program class members.
[2012-05-
The problem exists if you have added "ActionBarSherlock" and "DropBox" jars to your project. To solve the problem, add the below line to your proguard-project.txt file:
-dontwarn org.apache.**
The warning will be ignored and it will work because each of the jars alone are working. So I think, this will be the bug in ProGuard, if both are added.