If I run the script as root, the cursor behaves badly. If I run it as the pi user, it seems OK.

I'm a Python newbie - and I'm just starting to play with pygame. It's a Pi3 running Jessie with the official 7" touchscreen. Python 3.5.2 is installed. The touchscreen calibration is dead on when the Desktop displays, but when I run my simple test script the scaling appears to be way off, and the cu...