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I have a webworks smartphone app that uses focus-based navigation. The app also incorporates ad banners via the Banner object. When I include an ad banner in a page, the focus-based navigation doesn't work. If I exclude the Banner, focus-based navigation does work.
The following form post gives an example:http://supportforums.blackberry.com/t5/Web-and-WebWorks-Development/Ad-banner-interferes-with-focus-based-navigation/td-p/1713415
WebWorks' issue #97 seems to also be related to this matter and it's a 3 months old post :s#97