I´ve spoken to the Microsoft Support. He said the problem isnt known to Microsoft but he will forward my error report. I gave him the link to this thread.
I, however, have no hopes right now because of a "fun" fact: I´ve spoken to the Microsoft Support (different person) in March about this and back then she said the same thing.
But nothing happened.
He also said that 8.1 will fix a lot of things. But seeing what new problems 8.1 RTM is bringing I have my doubts.