Not Serializable Exception when running Vaadin OSGi in Tomcat

Hi,

I try running Vaadin OSGi Version 1.0.1 in the Tomcat Server. As OSGi Framework I use embedded Equinox.

Unfortunately I get this exception:

javax.servlet.ServletException: java.lang.IllegalArgumentException: setAttribute: Non-serializable attribute org.vaadin.osgi.VaadinOSGiServlet
	com.vaadin.terminal.gwt.server.AbstractApplicationServlet.handleServiceException(AbstractApplicationServlet.java:1010)
	com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:548)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)

Has anyone seen this?

Thanks,
Jan