The same foam warning should be applied to many AV products and containers: - 3M 2" videotape cases from the 1960s used a foam gasket that deteriorates. - Some Kodak 35mm Carousel slide drum cardboard boxes had a sheet of foam in them. - Some electronic component packaging and carrying cases were/are foam lined. - Some 3M 1" and 2" videotape reels had a foam lined upper flange. in this case, the problem was not with the foam but rather with the adhesive that leaked through the foam onto the tape pack. Alan Lewis Washington, DC In a message dated 9/29/2015 12:41:16 P.M. Eastern Daylight Time, [log in to unmask] writes: Last night I pulled out a Chandos CD set that I had bought in the mid-'80s and was horrified to see that the foam sheet that was placed between facing CDs was rotting and adhering to the CDs. This residue seems to be unremovable, rendering the CDs unplayable. When I got home I checked other Chandos box sets and found the same problem developing. Strangely I looked at other brands similarly packaged and there didn't seem to be a problem. However I am now removing these sheets from ALL such sets. db=