So. It was some investigation.
It wasn't really me, but guczy. He asked me to log the event because of lack of language knowledge.
He droped it in a cache called GCBUMM in Hungary - N 47° 27,306'; E 19° 2,794' some reference in Hungarian: http://www.geocaching.hu/caches.geo?id=661
Unfortunately he didn't recognise, that this cache is not registered in the international web page. It happened on 24th of August.
I've picked up the bug from here on 25th of August.
I would have dropped it on the same week, but it wasn't reported on the webpage. I tried to investigate what happened and my holiday went over. :(