Considering that vdpau for 1.1 was abandoned long ago and no backporting is being done, I strongly urge finding a reasonable solution to provide 1.2.  The vdpau portion is stable, I can't speak for the rest of it, though I don't really see many bug reports.  You'd think a stable release would be out by now but I don't know what it's maintainers criteria is for that.  From what I've seen, he isn't the easiest person to contact and can be pretty slow when it comes to merging patches and so on.  Not sure how much of a priority xine-lib is for him, or maybe it's an issue of free time.  No clue.