Yeah, I’d say that qualifies as “common issue” 
and it’s definitely an easy mistake to make, but did the Arduino power up in your case? (iirc power to link feeds −12V to GND, and other voltages elsewhere, resulting in strange supply rails).
(guess I should go read the schematics again to see what the Arduino might see).
EDIT: So it looks like you’ll get −12 V on circuit GND, +12 V on one TL074 output (saw), and GND on one TL072 output (square) and a couple of 3340 inputs. Depending on how the opamp output stages fail when powered backwards (not going to test that 
), you might end up with a weak 12 V or 24 V supply to the 7805, which it can handle.