Warbler said:
I don't think I've ever had a DVD or Blu Ray disc, suffer DVD rot. I have had problems with a few skipping. Sometimes cleaning does the trick, sometime it was the machine. I have also had situations where a disc will skip and be unplayable in one machine, but play perfectly fine in another.
It's more rare than LD rot, but it does happen, especially with early discs. My late 90's copy of Moonraker is unplayable, and the first pressing of Goldfinger has one bad layer that won't play. A couple other discs in my collection have changed color under the surface like Moonraker has, but remain playable so far.
HD DVD is threatening to unseat Laserdisc as the rot king.
Blu Ray is still young enough to still have playback bugs across all the brands out there.