It got worse.
Now right at the start of printing after the heater gets up to heat the heater shuts off. Sailfish (on my Rep2) reads 000 when I attempt to manual set the temp and eventually the hot end cools too much.
Tested the same model using Makerware and the HW still works fine. It's gotta be from the S3D output.
Also... all sorts of weird things happened in the Process settings... e.g., the number of shells was default set to 49!
2.1 is definitely not ready for Prime time and now my version 2.0 is having the exact same problem that 2.1 had with the heater so I assume the default profiles are ruined. I will try chucking all the installed files and reinstalling 2.0