I should have posted this for you a while ago. My apologies for not doing it sooner. This was passed on to me by another user R C-R
He deserves the credit for this workaround. This is his post from an area in the forum where you have to be level 6 or higher in which to participate.
I am getting the same (global) error using iTunes 10.3.1 on a 2008 MacBook running 10.6.8.
A really, really awkward workaround that works for me (for now) is if you have the URL of the Internet radio server you can go to Advanced > Open Stream... (in iTunes 10.x) or type command + U, enter it there & click OK. The station should play fine in 10.x.
You can get the URL from any version of iTunes that still supports the "radio tuning service" (which I gather is an Apple server thing Apple is no longer supporting for 10.x). Play the station normally from the newer version & type command + I to open the info window. At the bottom of the "Summary" tab you will see the URL. (Annoyingly, you can't copy the text so you will have to write it down.)
Once you have that, you can play the station in 10.x & add it to a playlist for future use.
To check this out, maybe try http://184.108.40.206/stream/mbarsott.pls -- it is a European Jazz station that works fine for me with iTunes 10.3.1.
This workaround does work, but is a bit cumbersome. I'm still holding out hope that it is just a glitch.