In some cases you will find that the default master page associated with the PPS dashbaord upon deployment is not suitable. Usually it is because you need additional screen real estate to properly display the dashboard. All you need to do is create a new master page in Sharepoint Designer in your master catalog. I usually start with a copy of an existing master page.
Note when deploying to a subsite you need to ensure the master page you want to use has been copied to the master page gallery in the subsite.