Sean980 - 2008-08-18

I am having a sort of strange problem and just wondering if anyone else has had it too.
I have a group which inherits from 'guest' group, there is also one user in this group who is allowed to view some documents. when this user logs in the only thing he can see on the navigation panel is 'Home' and 'Help' buttons. all other functional buttons on the navigation panel such as 'Documents' and 'Personal' disappear. what's weired is that sometimes it just works fine meaning that other functions are also visible to him.
Once I tried deleting and recreating the user which afterwards it solved the problem but it only lasted a while and it keeps coming back.
Does anyone have a clue why that's happening?

Many thanks

PS. I doubled checked all the rights on that group and the user and it looks all right.