Plesk 10.3.1
Anything goes to the good direction with the upgrade of Plesk 10.3.1.
But there are some issues to solve for Parallels. And most of all i'll thinking that we going to the maintenance level of Plesk 9.5. The old Plesk 9.5 was very good for all of our Plesk users.
Into the beginning of Plesk 10 there was a lot of bug fixes needed to solve a lot of problems. As i see for now, Plesk 10.3.1 is a serious next step to upgrade your old Plesk 9.5.
Regards,
Edward