The themes look great, and I'm glad to see you using CSS classes, as such themes can then be 'overriden' by the end user with ease. When/if PM gets to use CSS in a more functional manner, it will be very easy for individaul users to create their own themes and the like (Some have suggested that PM could store these themes for users as well, which isn't too hard as well).

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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
It's not what you know, but knowing how to find it if you don't know that's important