I recently built a new application using WPF, so that I can learn the new technology. Now that I am trying to deploy the application, it appears as if it is running fine on
You can have this problem sometimes with templates and Blend, although I thought it had been fixed in the latest Blend. Basically when Blend "pulls in" information for making a new template, it can sometimes copy in Aero only stuff from Vista, which means the control you then create is then reliant on Vista :-(
I did think this was fixed though, although you may have been bitten by it if the project has taken a while to put together.