When I use Rich Display mode and click on the Size drop down, certain sizes are "cut off".  THe 5, for instance, is cut off by the size, and the size is almost overshadowed by the seven.

 

Same thing happens when I got to the Font dropdown - Comic Sans is hidden by Courier.

 

What gives here? It doesn't happen when I go to your site and look at the demos. I'm just downloaded 4.0 - I'm not specifiying any Themes, and I've created my own config file.