Similar Problem,
I can login, but the User Menu does not appear as in all other Mambo/Koomlas installations. Furthermore, when I click on the User's online, it returns "You are not authorized to view this page".
If I make my User Menu Public, it (and all items on it) appear fine, but this invalidates the purpose of the login process...
Tried loggin in as both admin and super admin on front end.. same results..
Any ideas would be appreciated.