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.**
-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.