gradient, yes, the CD was checked when burned.  I always have done that and even saved a file or two to ease any suspicion of corruption on the original burn.   This has happened since and honestly, who knows how or why for certain.

Perhaps someone can answer this one: Writable discs for home are one thing and commercially processed are another, I understand this is true?  Pressed and not cut as home or business users do with writable discs?

So, if Photoshop™ installation disc is here..will that one degrade or keep its stuff?  I would not like to have the pc ask for the disc and find corruption there.   With some smaller programs, we really do not know how the disc was done in the first place.  Not to think about or go nutzo.

Thanks for the reply.  Still, the tiny thumb is "fine" in small view but larger is unreadable. Humm...