I think it has something to do with the spring update. I had like 8 wmvhd movies burned to 8 different dl discs. They all worked fine without any errors. Since the spring update I havnt been able to get any of them to play properly. Some will play up 'till about half way and then the error pops up "unplayble media blah blah whatever" Others just wont play at all. So I decided to split my wmvhd files into two regular dvdr's. They all play as they should now, but it's pretty inconvenient to get up and change the disc just to finish the 2nd half of the movie. I would really like to know what happened and why the wmvhd's aren't playable from dl media anymore. As you have done I also was burning udf via nero. Good luck.
If you decide you want to split your files into two dvdr's, Boilsoft's wmv splitter is great for the job as is asftools. Just google em.
This post has been edited by THDVL: Jun 6 2007, 05:41 PM