ChildBrowser works in Eclipse Emulator and on HTC Evo. Breaks in PhoneGap Build.

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I am using ChildBrowser in my application. I am using Cordova 1.5, Jquery 1.7.1, Jquery Mobile 1.1.0 RC2. It works fine in emulator and on HTC Evo. When I use PhoneGap Build to build it, it breaks when loaded to phone.

I have
<a href="#" data-role="button" onclick="window.plugins.childBrowser.openExternal('http://www.sbcera.org/pdf_files/Compass_3_23_12.pdf');">Download The Compass</a>

Nothing changes except I have
<feature name="http://plugins.phonegap.com/ChildBrowser/2.0.0" />
in config.xml.

Any ideas?