I posted a question on Stack Overflow and after that I realized that the problem (and solution) was caused by a third party and nobody could really answer the question since it wasn't possible.
How do I close such question? It degrades my accept rate.
It doesn't feel right for me to post answer to my own question and accept it, when nobody had a chance.
Here is the question: http://stackoverflow.com/questions/2267935/fileinfo-copyto-silently-fails