Confluence 3-1 beta1 fails to start if JIRA 4.0 is also running in Tomcat

Hi everyone. When I try to start JIRA 4.0 and Confluence 3.1 together in Tomcat 6.0.20 the startup fails. I already adressed the issue in this support request: JSP-45714 But answer was that milestone releases are not supported. Now I thought because we use this config and Confluence is now beta I should create a bug report.

Error is something like: FelixStartLevel ERROR

See attached log!