我总是遇到 ProGuard 以下错误：
[2012-05-19 17:50:13 - xxx] Warning: there were 13 unresolved references to program class members.
[2012-05-19 17:50:13 - xxx] Your input classes appear to be inconsistent.
[2012-05-19 17:50:13 - xxx] You may need to recompile them and try again.
[2012-05-19 17:50:13 - xxx] Alternatively, you may have to specify the option
[2012-05-19 17:50:13 - xxx] '-dontskipnonpubliclibraryclassmembers'.
[2012-05-19 17:50:13 - xxx] Error: Please correct the above warnings first.
[2012-05-19 17:55:40 - xxx] Proguard returned with error code 1. See console
[2012-05-19 17:55:40 - xxx] Note: there were 239 duplicate class definitions.
[2012-05-19 17:55:40 - xxx] Warning: org.apache.http.entity.mime.FormBodyPart: can't find superclass or interface org.apache.james.mime4j.message.BodyPart
[2012-05-19 17:55:40 - xxx] Warning: org.apache.http.entity.mime.HttpMultipart: can't find superclass or interface org.apache.james.mime4j.message.Multipart
[2012-05-19 17:55:40 - xxx] Warning: org.apache.http.entity.mime.MinimalField: can't find superclass or interface org.apache.james.mime4j.parser.Field
我的 proguard.cfg 文件是：
-keep class android.support.v4.app.** { *; }
-keep interface android.support.v4.app.** { *; }
-keep class com.actionbarsherlock.** { *; }
-keep interface com.actionbarsherlock.** { *; }
-keepattributes *Annotation*
-keepattributes SourceFile, LineNumberTable
-libraryjars /libs/crittercism_v2_0_1.jar
-libraryjars /libs/dropbox-android-sdk-1.2.2.jar
-libraryjars /libs/FlurryAgent.jar
-libraryjars /libs/httpmime-4.0.3.jar
-libraryjars /libs/json_simple-1.1.jar
我已经添加了所有的外部库，为什么总是出现这些错误？有人可以帮忙吗？
编辑 21.05.2012： 问题是如果你添加“Dropbox”jar 和“ActionBarSherlock”。如果我只添加“Dropbox”，我没有问题。如果我只添加“ActionBarSherlock”，我没有问题。但如果我同时添加两者，我会得到上面的错误。