I am on PR 1.3 and have had no issues with skype or skype video calls, You might be able to go back to pr 1.2 but eventually applications will start requireing PR 1.3 will not update or install. I would suggest reflash pr 1.3 then slowly add your applications back I have added some applications that have negetivly impacted performance, especially true of the dev repo. I would think though the extras repo should be fine to use and I would file a bug in the bug traker if there are any problems from extras applications.