That was a pm I have received from rebirth24:
"Are you an idiot?
Do you even realize there is a difference between "DVD-R" and "DVD-R DL" ???"
Let me react in a nutshell:
Look at the posts here. Do it slowly, carefully... when you are finished, close your eyes.
If you open your eyes and the posts have not changed in the thread, then you have an answer who is the idiot.
And don't forget to check the titles of the posters, it helps.