wrong initial menuViewController transform ?

[l3bel]

The call to updateMenuViewWithTransform in viewDidLoad results in the menuViewController's view being pushed to far to the left in the very first run, subsequent transforms are ok (the starting position of the menuViewController's view in the closed menu is ok, past the first open/close). Actually, I'm not sure if this is a bug or a feature? For my case, I dont use a too wide background image and the background color appearing behind in the first openning of the menu was just not ok, i commented the call. I'm I missing something?