We have had confirmation from last.fm that the v1 streaming protocol will finally be disabled on 2012-12-10.

This will prevent last.fm radio plugin working. It is likely this should be removed (new API is available to subscribers only)

h4. Additional Information
Wiki docs:
http://wiki.team-mediaportal.com/index.php?title=1_MEDIAPORTAL_1/0_What%27s_New/1.3.x/1_UI_Related_Changes/Last.fm_Removed