New Post: DatagGrid: 'ScrollTip' ControlTemplate TargetType does not match templated type 'ScrollTip'

If I create a new XAML page in my project and paste just the following in it:

<Window x:Class="...Window"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
        Title="XceedErrorTestWindow" Height="300" Width="300">
    <xcdg:DataGridControl />
</Window>

The Visual Studio designer cannot show the page and gives this message:

ArgumentException: 'ScrollTip' ControlTemplate TargetType does not match templated type 'ScrollTip'.

The grid seems to render fine at run-time, just some weirdness with the designer. Anyone seen this?

Visual Studio 2012 Update 4. Xceed.Wpf.DataGrid.dll and Xceed.Wpf.Toolit.dll are both at version 2.2.0.0.

Also posted on Stackoverflow