I have been experimenting with rich:dataTable a bit to give it a custom header, or more specifically add rounded corners/borders to it and use the same gradient that is used for all panels. However, the gradient rendered doesn't respect the CSS rounded corner properties of .rich-table-headercell:
The gradient is rendered across the borders for whatever reason. Is this intended? Or is it a bug? The panel gradients on the other hand do respect the rounded corners...