IPhone SDK: UIScrollView not scrollable as a UINavigationBar title view?

I have a custom UIView that has a UILabel in a UIScrollView. This view works fine under normal circumstances.
When I set an instance of this view as the navigationItem.customTitleView of UIViewController, the view appears as the title on the navigation bar, but I can no longer scroll the view.
Any ideas? Are there restrictions on navigation bar custom views that were not described in the docs? I don't recall reading any limitations.

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iPhone Dev Center
Downloads
Read me before downloading
If you have updated your device to iPhone OS 3.1.3 with iTunes, you must install iPhone SDK 3.1.3 in order to continue with your development.
*iPhone SDK 3.1.3*
iPhone SDK 3.1.3 includes the Xcode IDE, iPhone simulator, and a suite of additional tools for developing applications for iPhone and iPod touch.
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Snow Leopard Build: 10M2003a
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iPhone SDK 3.1.3 with Xcode 3.1.4
iPhone SDK 3.1.3 with Xcode 3.1.4 Readme
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iPhone SDK 3.1.3 with Xcode 3.2.1
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Message was edited by: Jedive

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Hi--
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IPhone SDK: UIScrollView not scrollable as a UINavigationBar title view?

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