Bizarre Window Behavior

In my desktop application, I have a Movable Modal Window with several Text Fields and Labels. When I run the application and open the window a strange event occurs. As I tab through the Text Fields, the Labels darken (get bolder), and they continue to get even darker as I continue to tab through the Fields.
I have no code (that I know of) that would affect the labels in this window. Any ideas as to what may cause this?


Thank you Jeff. Setting the label’s Transparent Property to False (Off) fixes the issue. Still, very odd. Is this a bug?

Sure seems like it. These already a couple of feedback reports (in Jeff’s link)