My quest is "Kill the dragon at bonestrewn crest"
I went there, there was no dragon, I activated the word wall and got my thu'um. I looked around for the dragon and found he was glitched on a tree. He was flying, but not going anywhere. Then he suddenly shot backwards and looked like he was being dragged by only one wing. He won't attack me and whenever I attack him enough, he never goes down to the ground and his health magically regenerates.
I have had a problem with this dragon for almost the entire game, I just hoped he wasn't the same dragon when I accepted the bounty.
I can't kill him, at all. Anyone else have this issue?

I'm playing on an Xbox360.

Same, he is the only MJ wannabe in my game. He also resisted every console command.

This particular dragon spawn seems to be funky. I've had problems with it on three saves.

Save one, I got the radiant quest to kill a dragon - and upon my arrival it attacked me, disappeared, then gave me it's soul. Thought nothing of it, got the word from the wall and turned in the quest. Explored the area later, only to find an invincible skeletal dragon attacking me. Hauled ass. Upon later visits, it was simply an invisible invincible dragon attacking me. Woo! This area stayed like this for the remainder of this save.

Save two, same thing. Except it jumped to the invisibility. But I was able to kill it this time.

Save three, was after the current patch. The original problems no longer occur - but this is the only dragon in my save to have the "Backwards" problem.

Dammit, Bonestrewn Crest! Get it together! =P

For me it was caught in a tree until I hit it with Dragonrend. Then it got flung off into the distance really fast.

yea he is effed up in my game as well, this is the one south of windhelm near guisers right? hes impossible to kill. wont land,, glitches into everything.. when i long range shoot him w a bow (when he is not doing the moonwalk at 10000mph) if i get his health down to a certain point, he freaks out fly's all over the place and regenerates.. must be a universal bug.

I have had this same problem on PC too.

PS3 and this Dragon is beyond messed up he fly's faster than a jet plane. Dragonrend is useless its bugged to high heaven for me...