Based on my experiment with various RenderingMode, the reported problem only occurs when using the HTML5 RenderingMode. There is no white space under the status bar of WebGrid when using XHTML RenderingMode.

Could you please try to use XHTML RenderingMode and let us know the result?

I have the same results in both HTML5 and XHTML RenderingModes. I have found that setting the parent container's height to the desired grid height and setting the grid's height to 100% fixes the issue in IE10+. However, I am not looking for a workaround, but instead for the grid to be fixed.

Thank you for sharing the workaround with us. ASPNET-188 has been submitted to WebGrid development team regarding the whitespace problem. I will keep this thread updated with any news I heard from the team regarding ASPNET-188.