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-
Possibly you need to :
-keep class org.apache.http.**
-keep interface org.apache.http.**
That is assuming of course ProGuard is complaining about the apache classes. Admittedly I am guessing somewhat as I'm no expert on ProGuard.
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.