Starting yesterday, Illustrator has been refusing to let me set a line weight under 1pt. If I set a lower one, the line snaps back to 1pt weight.
This is crippling to my work: The art is being output to a laser cutter. 0.01pt lines are how you signal "cuts" for the printer driver. Heavier weight lines are treated as "etch" commands. Without fine lines, I can't cut things out.
I first noticed the problem yesterday, and it's persisted through reboots and such. Prior to it cropping up, I'd been doing a lot of work with making custom brushes in Illustrator.
Has anyone run into this before or have an idea what might cause it?