Sky+ software update.
Just to let you know that I have had this problem for the last week and have been switching off at the mains to fix it (temporarily). I tried the "fix" reported in your article and it went wrong again a few hours later. I have the feeling that the only relevant part of the Sky "fix" is pulling the mains plug.
Let's hope they fix it soon. I have mentioned it to a Sky employee and he said he has informed a couple of people internally but can't say how soon it will be resolved.
One suggestion is to ask Sky for the previous version of software.