WB DVDs from the 2000s are malfunctioning?

Via Ars Technica, this unusual news: 

In a statement to JoBlo shared on Tuesday, WBD confirmed widespread complaints about DVDs manufactured between 2006 and 2008. The statement said:

Warner Bros. Home Entertainment is aware of potential issues affecting select DVD titles manufactured between 2006 – 2008, and the company has been actively working with consumers to replace defective discs.

Where possible, the defective discs have been replaced with the same title. However, as some of the affected titles are no longer in print or the rights have expired, consumers have been offered an exchange for a title of like-value.

Consumers with affected product can contact the customer support team at whv@wbd.com.

This was an interesting comment on the potential chemistry issues: 

its oxidation of the metal substrate that is encased in the plastic outer disc. The readable surface in there needs to stay sealed between the layers but eventually the bonding between them can fail and let in air which is why the rot usually starts from the inside of the disc and spreads outward. I worked on the blu-ray standard and this was a big concern when designing that format as the disc itself was even more prone to quickly degrading due to the even smaller physical indentations that designate a 1/0 on the disc media (compared to a dvd).

Here's what Wikipedia has to say about the composition of optical discs: 

Write-once optical discs commonly have an organic dye (may also be a (phthalocyanine) azo dye, mainly used by Verbatim, or an oxonol dye, used by Fujifilm[4]) recording layer between the substrate and the reflective layer. Rewritable discs typically contain an alloy recording layer composed of a phase change material, most often AgInSbTe, an alloy of silver, indium, antimony, and tellurium.[5] Azo dyes were introduced in 1996 and phthalocyanine only began to see wide use in 2002. The type of dye and the material used on the reflective layer on an optical disc may be determined by shining a light through the disc, as different dye and material combinations have different colors.

Sounds like it's probably not actually the metal? Pretty interesting to think about, though.