BBC Radio Podcast Problems

I've been out of the loop recently so have no idea when this problem may have emerged but now, when I try to play BBC podcasts via the logitech podcasts app or using my own favourites selection based on the opml file generated within mysqueezebox, I get the following error:

Error HTTP/1.0 400 Bad Request

All the episodes appear correctly with the appropriate icons, titles and bitrate info but they won't play. Downloaded versions of the files play just fine and I have no issues with any of the radio live streams etc.

I notice that the Beeb (bless 'em) have changed the addresses of these podcasts so, for example

BBC Radio 4 A Point of View was:

<outline URL="http://downloads.bbc.co.uk/podcasts/radio4/pov/rss.xml" text="A Point of View" type="link" />

and is now

<outline URL="http://www.bbc.co.uk/programmes/b006qng8/episodes/downloads.rss" text="A Point of View" type="link"/>

but the results are exactly the same.

Apart from a few updates to the Raspberry Pi server OS I have made no changes to my system and feel sure that the problems lie elsewhere - the BBC has form in these matters.

Do any other BBC and Squeezebox fanatics recognise this problem and know how to resolve it?

Thoughts and ideas would be most welcome - thanks.