I recently sent my EX1 to the local Sony service center for the firmware upgrade. When I got it back I wanted to be sure they installed the latest one (1.11) so I pressed Menu_Sel/Set_cancel. Everything fine..

Now is there a way to hide the maintenance menu again.. since I don´t want one of the videographers I work with, messing with it?

when I turned my ex3 off and on again, it went away.