What's the story with Stephan Vuckovic

There are lots of posts and stories around in German about Stephan Vuckovic and doping. My German isn’t flash. Add to that the google translation is pretty unintelligible on “technical” matters. Can anyone provide a brief synopsis if what’s going on? I am assuming that he failed a test. Similarly, wasn’t there something a while back about Lothar Leder and a questionable result? Was that resolved?

http://www.slowtwitch.com/News/Did_Silver_medalist_use_EPO__689.html
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thanks, must have missed that one
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