I only ever use catchup these days due to the amount of adverts. They make standard TV unwatchable.
Anyway whenever I try to download in HD it says somthing like "To watch this you need to upgrade or reactivate your subscription". I don't need an upgraded subscription because the programs I try to download are from channels I have HD versions of. So that leaves the reactivation thing. WTF is meant by "reactivate your subscription"? I'm pretty sure it's some sort of glitch.