[Pljava-dev] pljava on x86_64

I am having a problem with using pljava on SuSE 10.0 running on an x86_64 box.
I have managed to compile and install pljava from source and the install.sql
(suitably amended) successfully runs and installs the schema and functions.
However, running the function to load and run the examples.jar resutls in
postgresql crashing with the following messages recorded in the log:

java.lang.InternalError
at java.util.zip.Inflater.init(Native Method)
at java.util.zip.Inflater.<init>(Inflater.java:75)
at java.util.zip.ZipFile.getInflater(ZipFile.java:375)
at java.util.zip.ZipFile.getInputStream(ZipFile.java:320)
at java.util.zip.ZipFile.getInputStream(ZipFile.java:286)
at java.util.jar.JarFile.hasClassPathAttribute(JarFile.java:462)
at java.util.jar.JavaUtilJarAccessImpl.jarFileHasClassPathAttribute(
JavaUtilJarAccessImpl.java:15)
at sun.misc.URLClassPath$JarLoader.getClassPath(URLClassPath.java:80
9)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:293)
at sun.misc.URLClassPath.getResource(URLClassPath.java:160)
at java.net.URLClassLoader$1.run(URLClassLoader.java:192)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
ERROR: Java exit monitor failure (final)

Can anyone assist?

Nick