Jackbauer,
I understand that the mayday went out just before 23:55 and the aircraft landed at 00:32. Therefore, it didn`t go on for an hour as you seem to think.
Also, it wasn`t overhesd Prague but working Prague control in Czech airspace close to the German border.
FRA 060/06 Cavok with 2 13000 feet slabs of concrete. Aircraft heavy. Need we go on.