Blank DVDs show up as read-only (can't burn DVDs)

When I insert a blank DVD, the disk utility opens and it says the disk's capacity is 0 bytes, and it is read-only. The disk also doesn't mount, I have to eject it through the disk utility.
I have tried two brands that have worked in the past, one is DVD-R, and the other is DVD+RW. I haven't tried to burn a DVD in at least six months, so I don't know what software or settings are different since then.

I usually repair permissions after updates for that reason, but I did so again anyway and rebooted with the same result.
But when I created a new account and inserted a blank disk I was asked what to do with it so I opened it with Disk Utility to see what it says about the disk. It still said, "size 0 bytes, read-only" even though when I inserted the disk it said, "You've entered a blank disk, what would you like to do?"
So I guess at some point, 1) I set blank DVDs to open automatically in Disk Utility, and 2) for some reason Disk Utility says blank disks are read-only (or when that happens you can't write to the disk)
Anyway, all I had to do was set blank DVDs to open in the Finder. I'm burning a DVD right now.
Thanks for the help.

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"Friend" <[email protected]> wrote in message
news:3cafe898$[email protected]..
>
for instance, if I have an application which allows user toadd/modify/delete/ready-intensive
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Blank DVDs show up as read-only (can't burn DVDs)

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