Thanks for the replies, guys.
The way I caught this was comparing vinyl rips I made to the CD version. I had an old rip done on a Rega (which always ran fast), the CD rip, and a new vinyl rip done on the Amadeus. The Rega rip was fast, the Amadeus rip was slow, and CD rip was in the middle. The slow rip sounded like it was in another key compared to the fast rip.
Anyway, kinda bummed that I went to all the effort to rip an LP only to find out that it was flawed. Live and learn, I guess.
BTW, even in it's slowed down state, the Amadeus killed the Rega. No surprise there.