I have the same problem.
Failed to load contents from file
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Time: 2012-02-17 14:56:35
XMind: 3.2.1 Pro
Java Version: 1.6.0_29
Java Vendor: Apple Inc.
Java Runtime: Java(TM) SE Runtime Environment
Version: 1.6.0_29-b11-402-11M3527
Java VM: Java HotSpot(TM) Client VM
Version: 20.4-b02-402
Vendor: Apple Inc.
Info: mixed mode
Operating System: Mac OS X 10.7.2 (i386)
Language: en
Country: US
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java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:127)
at java.util.zip.ZipFile.<init>(ZipFile.java:143)
at
org.xmind.core.internal.dom.WorkbookBuilderImpl.doLoadFromFile(WorkbookBuilderImpl.java:
216)
at
org.xmind.core.internal.AbstractWorkbookBuilder.loadFromFile(AbstractWorkbookBuilder.java:
117)
at
org.xmind.ui.internal.editor.FileStoreWorkbookAdapter.loadWorkbook(FileStoreWorkbookAdapter.java:
38)
at
org.xmind.ui.internal.editor.WorkbookRef.loadWorkbook(WorkbookRef.java:
338)
at org.xmind.ui.internal.editor.MindMapEditor
$LoadWorkbookJob.run(MindMapEditor.java:1016)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)