haha I just finally noticed that and came back here to clear that. That took me entirely too long to find. I've been copying that block of code across projects without really looking at it I guess!
I'm trying to use an encoder knob on pins 4 and 5, as well as an I2C OLED on pins 18 and 19. If I have the display in the code, pin 4 is pulled high and overpowers the 10k series resistor I have going to the signal from the knob. What causes...