If an SDK-created Page spec with 2 UIwidgets includes the ParameterSection to pass parameters, then the second UIWidget never loads at all. The page section with the ParameterSection element is a uiwidget section, pointing to another uiwidget section.
We're currently evaluating this issue for a fix in a future patch or service pack.
Steps to Duplicate
1) Using the SDK, set up a PageDefinition with 2 UIWidgets 2) Use the ParameterSection element to pass parameters from UI widget #1 to UI widget #2. 3) Reference two datalists - The uiwidget specs reference the datalists. 4) Attempt to load the page. Note that parameters cause the second widget to fail/not load