Not long ago Slovenian bank Nova KBM had been nationalised and around 20% stocks which belong to Polish investors had vanished from they accounts today.
This was established with European Central Bank who admitted this is a proper way to act in this case (to cancel investment without refunding).
Polish news:
http://wyborcza.biz/Gieldy/1,114507,15236020,Z_rachunkow_polskich_inwestorow_zniknely_akcje_slowenskiego.html?biznes=wroclaw#BoxSlotII3img#BoxBizTxt