Pvr subtitle placement after upgrade

PVR subtitles are smaller than before the upgrade to Isengard and they are now placed a bit up and to the left?!? I just tried Isengard on my Ubuntu laptop and there it works as expected.

Also changing resolution does not change anything, and subtitles on movies and tv-shows works as normal.

How can I downgrade different packages for testing purposes?

Same here. Only applies to HD-channels, right?