Argh. I'm getting frustrated.
I basically never sync or backup my iPhone 4, and rarely update my iTunes software.
Now I have a 5, and I want to backup my 4, either to my iMac or iCloud, and for some reason the damned thing won't backup. I tried the computer backup and it got hung up and froze the damned thing. Then I tried backing to iCloud and it hung up as well - never got anywhere. I let it run all night, I woke up and the phone was hot to the touch and it was still calculating time remaining or whatever.