I'll admit mine. First gallery, young me, the director kept saying "we'll figure out the framing together" and never once asked what I wanted. I signed anyway. Then the hanging was a disaster and I spent three months fixing work they'd damaged with bad hardware. I knew, and I signed anyway. Hunger does that.

What red flag did you walk into with your eyes open, and did it cost you? Or did it surprise you and turn out fine? I'm curious which ones are worth ignoring.