Bob,
the settings that you have suggested, do not change the error. The MC window becomes white, in the upper display, it looks as if MC something is playing. That's all. Then I have to kill MC because it becomes unresponsive. I've tried it with softvol and PulseAudio - the same behavior.
The same link in RadioTay works ---> The DAC indicates 41.1 kHz.
VLC and VLC Webplayer works well ----> The DAC indicates 48 kHz.
The Flash player of Radio Polskastacja ---> The DAC indicates 48 kHz.