I just wanted to post that too, I tried it and get a "bad MDL" message. So what can I do?

I feel a bit like having been tricked, because I paid 50 euros which is not so few for me and now I don't even get the smallest patches. Ok, one very small patch which doesn't really fix anything. If conitec or sybex want their clients to feel offended, this is one of the easiest way to do this :/ having them watch others get their updates while they sit on their old version! Although they paid the same price (and just took the wrong publisher).