ITunes 10.1.1 backup to disk failure

Question

This one has me perplexed. I do periodic incremental backups of my iTunes library via the iTunes function. I haven't had any trouble with this until 10.1.1, where the backup starts fine, it asks for a disk, and I give it a DVD per usual. It then tells me i'll need 4 disks, and I tell it to continue. Then...nothing. The burn never starts, and even after waiting a very long time, I can simply eject the still blank DVD.
So, I figured I'd do a complete backup of all my purchases (not just the 'since last backup' ones.) I start the procedure, and iTunes tells me I'll need 20 DVDs that size. After the 7th, iTunes asks for a disk...and then same as before, just stops, leaving a blank DVD in the drive. A subsequent incremental backup reports the same as the first instance - reporting 4 DVDs needed, but then never starting.
The usual tricks of restart, reload of iTunes etc don't repair. Even dumped the caches and preferences. No dice. And no problem buring other DVDs, playlists or data disks from OSX 10.6.5. This is pretty clearly an iTunes issue.
OSX 10.6.5 on a mid 2008 iMac. Didn't notice a problem until 10.1.1.
Thoughts?

Answer 1

FWIW, try this:
check if you have read & write permissions for your music folder. in finder, right-click on it and +get info+. unlock the little padlock (you may have to enter your admin password) and change the permission settings. next, click on the little gear-shaped icon and +apply to enclosed items+ like so
the important part is to *apply to enclosed items* !
now try backing up again.
JGG