[dbdoclet] problems generating pdf output

hiya. i'm trying to generate pdf output from my javadocs. when i do so, i get the following exception. i'm using dbdoclet-0.70 with java-1.5.0_05 on a linux box. any suggestions would be welcome.

- donald

Running dbdoclet...
Copyright (c) 2001-2005 Michael Fuchs
Version 0.70.0 Build 11
Constructing reference map...
Constructing javadoc tag map...
Processing package com.rhoworld.foo...
Constructing statistics...
Running docbook-xsl...
Compiler warnings:

file:/home/balld/src/dbdoclet/share/dbdoclet/docbook/xsl/fo/formal.xsl: line 433: Attribute 'border-left-style' outside of element.

file:/home/balld/src/dbdoclet/share/dbdoclet/docbook/xsl/fo/formal.xsl: line 434: Attribute 'border-right-style' outside of element.

file:/home/balld/src/dbdoclet/share/dbdoclet/docbook/xsl/fo/formal.xsl: line 435: Attribute 'border-top-style' outside of element.

file:/home/balld/src/dbdoclet/share/dbdoclet/docbook/xsl/fo/formal.xsl: line 436: Attribute 'border-bottom-style' outside of element.
ERROR: 'The first argument to the non-static Java function 'insertCallouts' is not a valid object reference.'
FATAL ERROR: 'Could not compile stylesheet'
##################################################################
# DEBUG START DocletException
##################################################################
org.dbdoclet.doclet.DocletException
org.dbdoclet.doclet.DocletException: javax.xml.transform.TransformerConfigurationException: Could not compile stylesheet
at org.dbdoclet.doclet.docbook.BookManager.process(BookManager.java:266)
at org.dbdoclet.doclet.docbook.DocBookDoclet.writeContents(DocBookDoclet.java:186)
at org.dbdoclet.doclet.docbook.DocBookDoclet.start(DocBookDoclet.java:111)
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:585)
at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
at com.sun.tools.javadoc.Start.begin(Start.java:128)
at com.sun.tools.javadoc.Main.execute(Main.java:41)
at com.sun.tools.javadoc.Main.main(Main.java:31)
Caused by: javax.xml.transform.TransformerConfigurationException: Could not compile stylesheet
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:824)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:619)
at org.dbdoclet.service.XMLServices.xslt(XMLServices.java:367)
at org.dbdoclet.doclet.docbook.BookManager.process(BookManager.java:248)
... 12 more
================================================================
CAUSE #0: org.dbdoclet.doclet.docbook.BookManager
org.dbdoclet.doclet.docbook.BookManager.process(BookManager.java:266)
================================================================
CAUSE #1: org.dbdoclet.doclet.docbook.DocBookDoclet
org.dbdoclet.doclet.docbook.DocBookDoclet.writeContents(DocBookDoclet.java:186)
================================================================
CAUSE #2: org.dbdoclet.doclet.docbook.DocBookDoclet
org.dbdoclet.doclet.docbook.DocBookDoclet.start(DocBookDoclet.java:111)
================================================================
CAUSE #3: sun.reflect.NativeMethodAccessorImpl
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
================================================================
CAUSE #4: sun.reflect.NativeMethodAccessorImpl
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
================================================================
CAUSE #5: sun.reflect.DelegatingMethodAccessorImpl
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
================================================================
CAUSE #6: java.lang.reflect.Method
java.lang.reflect.Method.invoke(Method.java:585)
================================================================
CAUSE #7: com.sun.tools.javadoc.DocletInvoker
com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
================================================================
CAUSE #8: com.sun.tools.javadoc.DocletInvoker
com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
================================================================
CAUSE #9: com.sun.tools.javadoc.Start
com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
================================================================
CAUSE #10: com.sun.tools.javadoc.Start
com.sun.tools.javadoc.Start.begin(Start.java:128)
================================================================
CAUSE #11: com.sun.tools.javadoc.Main
com.sun.tools.javadoc.Main.execute(Main.java:41)
================================================================
CAUSE #12: com.sun.tools.javadoc.Main
com.sun.tools.javadoc.Main.main(Main.java:31)
##################################################################
# DEBUG END DocletException
##################################################################

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