We have a WPF application in which we have the following XAML:
<TextBlock x:Name="HeaderRightSubtitle"
HorizontalAlignment="Left"
VerticalAlignment="top"
FontSize="10"
Foreground="#FFFFFF">
<TextBlock.Effect>
<DropShadowEffect
Color="#FFCACACA"
ShadowDepth="1"
Opacity="100"
RenderingBias="Quality"/>
</TextBlock.Effect>
</TextBlock>
It shows a nice shadow on all machines (XP, Vista) except for one XP machine on which is shows the white text on a solid, back, rectangle background also a bit offset. The XP has the same theme as the other machines.
Has anyone experienced this? What could be causing the DropShadowEffect to produce a solid black background on this one machine?