I hate to pull up a zombie thread, but my DL-8 is starting to suffer from the same problem that my old DD-6 did. The mode knob has gone haywire. Around half of the modes work and most of them are not what the knob says they should be. Thankfully the one second digital delay setting still works (as does the two second, but the eight second is the same as the two now) so I can use that with the tap tempo. I don't know if it's because I kept it on one setting most of the time or what. I guess for $60 and getting 10 years out of it I shouldn't be too upset. I might take it apart and see if I can spray some pot cleaner in there.

If I end up getting a different one, I'm looking at a JHS 3 Series Delay which is simple, reasonably priced, and doesn't have a mode knob to fail.