Backup problems
I decided for safety to back up my iPad and iPhone to iCloud.
I have iTunes 11.0 on OSX 10.8.2.
I told my iTunes to back up my phone. and it says "Last backed up to iCloud 6/16/12 11:27 AM. I have closed iTunes and opened it and told it to back up now again, and this date doesn't change. I went to my phone, and it started to backup, and while I was on my computer, my phone went dark. I started it, and it appeared to continue before telling me "The last backup could not be completed".
I told iTunes to back up my pad, and it looks as though nothing happens. It says "Last backed up to iCloud: Unknown". I went to my iPad and tried, periodically touching the screen (it is set to a longer on period than my phone is). It backed up OK.