When Radio is playing and you insert an Audio CD then the autoplay dialog pops up. If you select "yes" the AudioCD will NOT start playing. This works fine when Radio is not playing.

To reproduce:
* Make sure autoplay is enabled
* Start MP
* Start Radio (I used a shoutcast stream, I don't know if it matters)
* Insert an Audio CD
* Select Yes when the Autoplay popup comes up
* Nothing happens

Reported in the forums:
http://nolanparty.com/mediaportal.sourceforge.net/phpBB2/viewtopic.php?t=4389&start=0&postdays=0&postorder=asc&highlight=