诡异有关问题

[2011-04-05 11:05:25 - condi] Dx UNEXPECTED TOP-LEVEL EXCEPTION:java.lang.IllegalArgumentException: already added: Lcom/sun/mail/imap/DefaultFolder$1;[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.dex.file.DexFile.add(DexFile.java:143)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main.processClass(Main.java:372)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main.processFileBytes(Main.java:346)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main.access$400(Main.java:59)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:294)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:244)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:130)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:108)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main.processOne(Main.java:313)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:233)[2011-04-05 11:05:25 - condi] Dx     at com.android.dx.command.dexer.Main.run(Main.java:185)[2011-04-05 11:05:25 - condi] Dx     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[2011-04-05 11:05:25 - condi] Dx     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)[2011-04-05 11:05:25 - condi] Dx     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)[2011-04-05 11:05:25 - condi] Dx     at java.lang.reflect.Method.invoke(Unknown Source)[2011-04-05 11:05:25 - condi] Dx     at com.android.ide.eclipse.adt.internal.build.DexWrapper.run(DexWrapper.java:179)[2011-04-05 11:05:25 - condi] Dx     at com.android.ide.eclipse.adt.internal.build.BuildHelper.executeDx(BuildHelper.java:585)[2011-04-05 11:05:25 - condi] Dx     at com.android.ide.eclipse.adt.internal.build.builders.PostCompilerBuilder.build(PostCompilerBuilder.java:490)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:172)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:203)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:255)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:258)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:311)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:343)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:242)[2011-04-05 11:05:25 - condi] Dx     at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)[2011-04-05 11:05:25 - condi] Dx 1 error; aborting[2011-04-05 11:05:25 - condi] Conversion to Dalvik format failed with error 1