I'm using Firefox 10.0.6, Win 7. I can log in as administrator the first time into Onepoint Project (http://xxx:8080/opproject/login) after installation and create some users. When I log out, I am prompted for a username and password, but then only a blank page is displayed. Everything works fine in Internet Explorer, though, so I guess the server is running ok. The opproject log contains "java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor66.invoke(Unknown Source)" plus some line I can post upon request. Question: how to resolve this problem and use opproject in Firefox?