ehehe thank you!!!!! ..
perhaps I'm wrong... I repeat and ... nothing..
probably I set hypershader in a panel when i have it in another panel too and so the problem is in the other panel now...
but ... anyway I trick this problem and now I can work ...
The problem is attached to the project you use..
If you go to Documents/maya/ etc .. and you delete the "prefs" ..folder you reset all , and all works well but if you recall a bug project .. you have the problem another time..

I think it is a layout problem ... seems that maya when go in hypershade or another type of panel with no-manipulators don't reset when go in a camera "mode" and so the panel go in BUG and never re-show the manipulators...

we should send this problem to autodesk...

:bow: :bow: :bow: