Region background color does not fully cover area

Under VS2010 with Region Painting enabled the painting does not fully cover the background of the underlying region block. This is easily seen in the comparison images of VS2008 vs VS2010. In my case I have the old-style cyan background with black text for preprocessor directives. With Region Painting enabled you can see the cyan background partially in VS2010.

Steps to Reproduce:

1) Create a standard C# app

2) Add a #region pragma

3) Set the background color to cyan and the foreground color to black in VS

4) In CodeRush enable Region Painting

5) Go look at the editor window

Actual Results:

The region's VS background partially exposes over the CodeRush region painting

Expected Results:

It should look like it does in VS 2008.