Yeah, this is a problem with either XP Power Toys, or your display driver. You may want to consider checking to see if you have the latest drivers for your graphics card installed and see if the problem continues. Various applications are effected with the the Desk Manager app, so I don't necessarily know that it is something that Martin can easily address. I had it installed for about two weeks at one point, and eventually removed it because it just wasn't worth the trouble.
When you put everything into something, it means everything to you.