In a previous tip I showed how Expression Blend does not render effects if you are zoomed in above 400%. More times than not I am zoomed in well above 400% when I am designing UI components. I found out how to change the zoom setting to 800% and render the effects properly and allow me to design how I am accustomed to.
To change the percentage that effects will be rendered
1- Go to Tools/Options
2- Select “Artboard” from the list
3- Change the “Zoom threshold” from 400% to 800%