RibbonWindow background not set with IsGlassEnabled true

Hello to everybody,

It looks like the background of a RibbonWindow is not applied unless the IsGlassEnabled property is set to false.

If the IsGlassEnabled property is not set or it is set to true then the Background propery is ignored.

Here is an example:

<ribbon:RibbonWindow x:Class="WpfApplication1.MainWindow"
                     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:ribbon="http://schemas.actiprosoftware.com/winfx/xaml/ribbon"
                     x:Name="mainWindow"
                     Title="MainWindow"
                     Height="350" Width="525"

                     Background="Yellow"
                     IsGlassEnabled="True"
                     >     

Thank you,

Roberta