I’m sorry iTunes 11, despite my inital distaste, I tried to like you, but tonight was the last straw. The detail was unimportant, the method to get back to the stable and, most importantly, a usable iTunes 10.7 was found, installed and allowed me to see my Music in the iCloud on my laptop again.
As for Apple, perhaps you should do as I have many times suggested – rip it up and start again. You know, like you did with Mobile Computing and Mobile Phones?
Let me know when you do, in the meantime I’ll stick with a version that works as I need it to.