Cannot unmarshal JTable at all

The implementation of XSTR-284 revealed, that we inject an inappropriate type into a JTable:

Stack trace:
com.thoughtworks.xstream.converters.ConversionException: Could not call javax.swing.JTable.readObject()
---- Debugging information ----
required-type : java.awt.dnd.DropTargetContext
cause-message : null
class : javax.swing.JTable
message : Could not call javax.swing.JTable.readObject()
line number : 31
path : /javax.swing.JTable/java.awt.Component/default/dropTarget/java.awt.dnd.DropTarget/default/dropTargetContext/dropTarget
cause-exception : java.lang.reflect.InvocationTargetException
-------------------------------
at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callReadObject(SerializationMethodInvoker.java:77)
at com.thoughtworks.xstream.converters.reflection.SerializableConverter.doUnmarshal(SerializableConverter.java:363)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:115)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:51)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:117)
at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:15)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:655)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:643)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:593)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:586)
at com.thoughtworks.acceptance.JTableTest.test$$$$TODO$$$$JTable(JTableTest.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callReadObject(SerializationMethodInvoker.java:73)
... 27 more
Caused by: com.thoughtworks.xstream.converters.ConversionException: Could not call javax.swing.TransferHandler$SwingDropTarget.readObject()
---- Debugging information ----
required-type : java.awt.dnd.DropTargetContext
cause-message : null
class : javax.swing.TransferHandler$SwingDropTarget
message : Could not call javax.swing.TransferHandler$SwingDropTarget.readObject()
line number : 31
path : /javax.swing.JTable/java.awt.Component/default/dropTarget/java.awt.dnd.DropTarget/default/dropTargetContext/dropTarget
cause-exception : java.lang.reflect.InvocationTargetException
-------------------------------
at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callReadObject(SerializationMethodInvoker.java:77)
at com.thoughtworks.xstream.converters.reflection.SerializableConverter.doUnmarshal(SerializableConverter.java:363)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:115)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:51)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
at com.thoughtworks.xstream.converters.reflection.SerializableConverter$3.defaultReadObject(SerializableConverter.java:329)
at com.thoughtworks.xstream.core.util.CustomObjectInputStream.defaultReadObject(CustomObjectInputStream.java:62)
at java.awt.Component.readObject(Component.java:6826)
... 32 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker.callReadObject(SerializationMethodInvoker.java:73)
... 40 more
Caused by: com.thoughtworks.xstream.converters.ConversionException: Cannot convert type java.util.HashMap to type javax.swing.TransferHandler$SwingDropTarget
---- Debugging information ----
required-type : java.awt.dnd.DropTargetContext
class : java.awt.dnd.DropTargetContext
line number : 31
path : /javax.swing.JTable/java.awt.Component/default/dropTarget/java.awt.dnd.DropTarget/default/dropTargetContext/dropTarget
-------------------------------
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:161)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:115)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:51)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
at com.thoughtworks.xstream.converters.reflection.SerializableConverter$3.readFieldsFromStream(SerializableConverter.java:297)
at com.thoughtworks.xstream.core.util.CustomObjectInputStream.readFields(CustomObjectInputStream.java:115)
at java.awt.dnd.DropTarget.readObject(DropTarget.java:545)
... 45 more