Still can't find resources in XAML

This only seems to happen in my main project.  This used to work in the first couple of R#7 builds.  It seems to work if I start up a random project and create a structure like this:


See how my working example is set up below.

ProjectName
|
|--Resources
|    |--TextBlock.xaml (resourceDictionary)
|          | ResourceKey: DefaultTextStyle
|--App.xaml
|--MainWindow.xaml


App.xaml:

  <Application.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="Resources/TextBlock.xaml"/>
      </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Application.Resources>

MainWindow.xaml

<Window x:Class="StressTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        DataContext="{Binding RelativeSource={RelativeSource Self}}">
  <Grid>
    <TextBlock Text="Something" Style="{StaticResource DefaultTextStyle}"/>
  </Grid>
</Window>

  I declare & reference resources in the same manner in my [much more complex] main project but it never picks up the resources, it simply says "Resource __ is not found". Is there some R# settings I can check?