Bug with UISplitviewController? - Pop-over button remains on orientation change

[kamy]

hey guys,

To illustrate the issue, which i think is a bug with UISplitViewController, i have created a sample project which creates
3 tabs at the bottom - the first tab has a splitview controller with master and detail views, the second tab has a view and the 3rd tab also has another splitview controller with master and detail views.

The xcode project and files are attached as a .zip.

We will need 4.3 SDK as base SDK.
STEPS
Run the app in portrait mode.
We can see the 3 tabs
Tab 1 - SplitView1
Tab 2 - Ordinary View
Tab 3 - SplitView2

Go to Tab1 and Tab3 - we can see the popover button on the toolbar.
Go to Tab1 - Switch to landscape - popover button dissapears
Go to Tab3 - popover button remains in landspace mode!!

BUG!
Can anyone validate this and point what am doing wrong?