BPEL Validation Errors in NetBeans 5.5.1

I‘ve recently updated my production NetBeans 5.5 environment to NetBeans 5.5.1 and have been having some issues with BPEL modules.

If I create a BPEL module in NB 5.5, everything works as expected, however if I try to build the same codebase on NB 5.5.1, I get the following error.

Interestingly enough, I get the same problem with NB 6 M10

<target name="pre-dist">
09-Jul-2007 13:08:44  
org.netbeans.modules.bpel.project.anttasks.IDEValidateBPELProject
loadAndValidateExistingBusinessProcess
SEVERE: Validation has errors on /home/david/NetBeansProjects/EchoBPEL/src/EchoProcess.bpel
Error Message -  
org.netbeans.modules.xml.wsdl.validator.spi.ValidatorSchemaFactory.getSchemaSource()
Ljavax/xml/transform/Source;
09-Jul-2007 13:08:44  
org.netbeans.modules.bpel.project.anttasks.IDEValidateBPELProject  
loadAndValidateExistingBusinessProcess
SEVERE:  
org.netbeans.modules.xml.wsdl.validator.spi.ValidatorSchemaFactory.getSchemaSource()
Ljavax/xml/transform/Source;
/home/david/NetBeansProjects/EchoCompositeApp/nbproject/build-impl.xml:104:  
The following error occurred while executing this line:
/home/david/NetBeansProjects/EchoBPEL/nbproject/build-impl.xml:155:  
java.lang.AbstractMethodError:  
org.netbeans.modules.xml.wsdl.validator.spi.ValidatorSchemaFactory.
getSchemaSource()Ljavax/xml/transform/Source; BUILD FAILED (total time: 0 seconds)

Does anyone else have this problem? The workaround I have found at the moment is to comment out the BPEL validation code in the ant script (build-impl.xml line 155) as follows:

<target name="pre-dist">
        <!-- Empty placeholder for easier customization. -->

        <!-- You can override this target in the ../build.xml file. -->
        <mkdir dir="${build.dir}"/>
        <!-- run the validation task here. -->
<!–
        <BpelProjectValidate buildDirectory=”${basedir}/${build.dir}”
        sourceDirectory=”${basedir}/${src.dir}”
        projectClassPath=”${javac.classpath}”
        buildDependentProjectDir=”${basedir}/${build.dir}/dependentProjectFiles”
        classpathRef=”ant.task.classpath.validation”  
        allowBuildWithError=”${allow.build.with.error}”/>
–>