本文发表在 rolia.net 枫下论坛安装过程中，总是弹出下列错误：
An unexpected exception happened in thread Thread-15
[2012-02-06 23:45:50.328]: java.lang.IllegalAccessError: org/apache/xml/serializer/ExtendedContentHandler
[2012-02-06 23:45:50.328]: at org.apache.xalan.transformer.TransformerImpl.createSerializationHandler(TransformerImpl.java:1233)
[2012-02-06 23:45:50.328]: at org.apache.xalan.transformer.TransformerImpl.createSerializationHandler(TransformerImpl.java:1060)
[2012-02-06 23:45:50.328]: at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1268)
[2012-02-06 23:45:50.328]: at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1251)
[2012-02-06 23:45:50.328]: at org.netbeans.installer.utils.XMLUtils.saveXMLDocument(XMLUtils.java:147)
[2012-02-06 23:45:50.328]: at org.netbeans.installer.utils.XMLUtils.saveXMLDocument(XMLUtils.java:102)
[2012-02-06 23:45:50.328]: at org.netbeans.installer.product.Registry.saveProductRegistry(Registry.java:1013)
[2012-02-06 23:45:50.328]: at org.netbeans.installer.product.Registry.finalizeRegistry(Registry.java:349)
[2012-02-06 23:45:50.328]: at org.netbeans.installer.wizard.components.actions.FinalizeRegistryAction.execute(FinalizeRegistryAction.java:66)
[2012-02-06 23:45:50.328]: at org.netbeans.installer.wizard.components.WizardAction$1.run(WizardAction.java:123)
[2012-02-06 23:45:50.328]: ... show message dialog
[2012-02-06 23:45:50.328]: title: Critical Error
[2012-02-06 23:45:50.328]: message: An unexpected exception happened in thread Thread-15
[2012-02-06 23:45:50.328]:
[2012-02-06 23:45:50.328]: Exception:
[2012-02-06 23:45:50.328]: java.lang.IllegalAccessError:
[2012-02-06 23:45:50.328]: org/apache/xml/serializer/ExtendedContentHandler
[2012-02-06 23:45:50.328]:更多精彩文章及讨论，请光临枫下论坛 rolia.net