Well, at least for me, it seems like the jury has come back with its verdict. No labels. It seems my son watched "The Chronicles of Riddick" with no problems at all. So I thought. He had peeled and scraped off the label because it wouldn't work and after doing so it did. No more labels for me. I was a bit "ticked" though to find the dvd was stuck in the top of the player because of the adhesive from the label. Since they will play in my computer, it's time to backup up all my back ups. :-o
If your going to back them up because you already put labels on them, why not use some rubbing alcohol to remove the adhesive once you scrape the label off. As long as you place the dvd's data side on something soft like a cotton tee-shirt you should be able to rub the top pretty vigorously without problems. I say this because I had a soda spill in my car and got into my disc holder, I had to clean like 20 disc's with this thick-sticky goo thanks to the hot Florida sun.
That's nice Welsh/Cornish name, there's a baby bottle cleaning fluid, here in the UK it's called Milton it sterilizes the bottle between baby feeds..
mix up a strong solution of this, place the labelled discs' in, and leave for an hour or so, after that the labells have/will float off.. wash with clean water, and allow to dry.
No rubbing, no carcinogenic chemicals, just clean, water, and discs'..