Yes, the latest version of Pitch 'n Time is supported with Pro Tools 10.
For users who own and earlier version of Pitch 'n Time and would like to use it with Pro Tools 10, you will need to upgrade to the latest version of Pitch 'n Time before it will be compatible.
For instructions on purchasing an upgrade for Pitch 'n Time, please read this article on upgrading your Pitch 'n Time license.
If you are having any further issues please start a help request.