title: Flex AdvancedDataGrid
body: <p>I have an AdvancedDatagrid in my Flex application.</p>
  
  <pre><code>&lt;mx:AdvancedDataGrid id="reportGrid" creationComplete="groupedData.refresh()" width="100%" height="100%" variableRowHeight="true"&gt;
                      &lt;mx:dataProvider&gt;
                          &lt;mx:GroupingCollection2 id="groupedData" source="{reportData}"/&gt;
                      &lt;/mx:dataProvider&gt;
                  &lt;/mx:AdvancedDataGrid&gt;
  </code></pre>
  
  <p>I dynamically assign columns and grouping and summaries to groupedData GroupingCollection2.
  When I filter the datasource and call groupedData.refresh() the grid refreshes fine. But when I load data, and apply no grouping (add no groupings to the GroupingCollection2), the groupedData.Refresh() does not update the grid to show only the filtered in rows. I have also tried calling the grid's own InvalidateList(), to no avail.</p>