Header wiggles when selecting a row

[Mike]

When someone clicks on a row in my grid, the header wiggles left, right, left.  What is causing this?  My users are complaining that it is very annoying and would like it to stop.

Your help would be appreciated, here are my client settings:

<ClientSettings AllowColumnsReorder="True" AllowDragToGroup="True" AllowRowHide="True" EnablePostBackOnRowClick="False" ReorderColumnsOnClient="True">
   <Resizing AllowColumnResize="True" AllowRowResize="False" ResizeGridOnColumnResize="False" ClipCellContentOnResize="True" EnableRealTimeResize="False" />
   <Scrolling AllowScroll="True" UseStaticHeaders="True" SaveScrollPosition="True" />
   <Selecting AllowRowSelect="True" />
</ClientSettings>

[Kapil Jain]

Please check the .SelectedRow_<skinname> definition in the stylesheet if your padding or margin value is not matching with your heading style padding/margin, your header will always wiggle on selection of row. Quick test - comment the selected row styles to see the effect.