Xcode 4 Navigation item prompt property misbehaving?

When designing in Interface Builder and you add text to a prompt property, it creates an additional top title. This comes with the extra thickness needed to allow for 2 tiles in the navigation bar.

Once I remove the text, let's say to reset back to the way it was, it keeps that thickne开发者_StackOverflowss even though there is no text there. At runtime switching views makes the bar grow and shrink, which isnot nice.

My question is, how do you reset this back to a default single line thickness bar?

Thank you Jim

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In case anyone else has this problem...2 options

1 Fix unremoved xml in xib direct

A workaround, if this is a bug is to edit the *.xib file...as xml you can delete the entry left behind and seems to reset without issue...

e.g. To be sure, add value like "FOO BAR" and search for that in the text editor to find the key.

(take usual backup & care & own risk ofcourse)

(submitted online bug to apple for assessment)

2 Runtime programatic fix suggested by Drew C i.e. set self.navigationItem.prompt = nil

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In the Attributes Inspector pane of IB, change the value for Top Bar to "Navigation Bar" instead of "Navigatin Bar with Prompt"

Edit: See photo below-