Android build with jmDNS fails
===

I've added jmDNS 3.4.1 to my Android project. Copied the JAR under `lib`, then under "Java BuildPath"/Libraries added a reference.

Now my build fails with the following message in Console:

    [2012-07-27 22:59:07 - Yarxi] Dx 
    UNEXPECTED TOP-LEVEL EXCEPTION:
    java.lang.IllegalArgumentException: already added: Lcom/strangeberry/jmdns/tools/Browser$1;
	at 

    com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)
    	at com.android.dx.dex.file.DexFile.add(DexFile.java:163)
    	at com.android.dx.command.dexer.Main.processClass(Main.java:486)
    	at com.android.dx.command.dexer.Main.processFileBytes(Main.java:455)
    	at com.android.dx.command.dexer.Main.access$400(Main.java:67)
    	at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:394)
    	at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245)
    	at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:131)
    	at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:109)
    	at com.android.dx.command.dexer.Main.processOne(Main.java:418)
    	at com.android.dx.command.dexer.Main.processAllFiles(Main.java:329)
    	at com.android.dx.command.dexer.Main.run(Main.java:206)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    	at java.lang.reflect.Method.invoke(Unknown Source)
    	at com.android.ide.eclipse.adt.internal.build.DexWrapper.run(DexWrapper.java:180)
    	at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:703)
    	at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java:577)
    	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728)
    	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
    	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:321)
    	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:396)
    	at org.eclipse.core.internal.resources.Project$1.run(Project.java:618)
    	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    	at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:597)
    	at org.eclipse.core.internal.resources.Project.build(Project.java:124)
    	at com.android.ide.eclipse.adt.internal.project.ProjectHelper.doFullIncrementalDebugBuild(ProjectHelper.java:1000)
    	at com.android.ide.eclipse.adt.internal.launch.LaunchConfigDelegate.launch(LaunchConfigDelegate.java:147)
    	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:854)
    	at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
    	at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:937)
    	at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1141)
    	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
    [2012-07-27 22:59:10 - Yarxi] Dx 1 error; aborting
    [2012-07-27 22:59:10 - Yarxi] Conversion to Dalvik format failed with error 1

And when I look at the JAR contents in the Package Explorer under Referenced Libraries, I see that every class under every package in the jmdns.jar is listed twice. Two copies of JmDNS.class, two copies of JmmDNS.class, and so forth.

Any ideas what's wrong with the jar? I'm using other jars in the project, none of them act this way. Tried cleaning a few times, removed and re-added the JAR - same effect.

Might be worth noting that this is a library project, and the error pops up when I build the app that refers to the library.