HELP! Cannot read DVDs

Burnt two of the same DVDs with G5 and iDVD 6, made with iMovie and then iDVD 6 like many times before.
Tried to read them with G5 and home DVD player, but getting error messages, DVD cannot be read!
BUT: My iBook G3 can read the latest burnt DVD!
What is happening?
Fanny

Hi Fanny
Welcome to apple discussions. Have you recently switched brands of DVD. Tell us which types of DVD's you are using. Verbatim DVD-R Minus 4x is the media of choice and is what many will recommend on apple discussions.
SDMacuser

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