[xwiki-users] Login and Logoff problem using Xwiki 1.3rc1+oracle+tomcat6

Hi List, I'm experiencing problem to logoff when using FireFox and to login when using IE. When I'm using IE, xwiki was able to tell me if I'm not using the right login, but put me back to webhome without the authenticated status when I provide the correct login (Admin/admin) When I'm using FF, logoff doesn't work and I'd have to clear the cookies to remove the logged-in status. In regards to installation cleanness, I did try to create users and pages before I imported the default wiki documents. I removed a page I created before the defaul wiki was imported. I'm not sure if that affects this issue. Tomcat and Oracle installation are clean installs. The only config I've changed is the hibernate.cfg.xml I'd appreciate any help you could provide. Heres the detail of my installation. xwiki-enterprise-web-1.3-rc-1.war xwiki-enterprise-wiki-1.3-rc-1.xar Tomcat 6.0.16 Oracle 10g Windows XP Thanks! Benjamin Leung