Navigation controller toolbar blocks the bottom action sheet button

[phonehacker]

I'm using a standard navigation controller and setting the built in toolbar to visible. When I call up an action sheet, it displays properly, but I can't click on the part of the bottom button which overlaps with the toolbar. It seems that the toolbar is blocking this part of the button, even though the action sheet is displayed on top of the toolbar.

To recreate the error, download the UICatalog project from here and insert the following code into the viewDidLoad function in "AlertsViewController.m":

[self.navigationController setToolbarHidden:NO];

Now run the code, click on "Alerts" and the click on "Show Simple". Note that you can't click on the bottom of the "OK" button that comes up.

Am I doing something wrong or is this a problem in Apple's code? If it's an Apple problem, can anyone think of an easy workaround?