Report problem when running on Linux

I'm using soapUI Pro 2.5.1 on Linux, and I'm having a problem when generating test reports.

The first time I try generating an HTML report, the report.xml file is created, but the HTML file is not. On subsequent attempts, the following error occurs:

2010-04-14 12:07:01,710 ERROR [errorlog] java.lang.Exception: Missing transformer for format [Single Page (Print)]
java.lang.Exception: Missing transformer for format [Single Page (Print)]
        at com.eviware.soapui.impl.wsdl.actions.testcase.CreateReportAction.a(SourceFile:128)
        at com.eviware.soapui.impl.wsdl.actions.testcase.CreateReportAction.actionPerformed(SourceFile:98)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
(...)

I've tried upgrading to soapUI Pro 2.5.2, but the same problem occurs.

Has anyone run into this problem before?