I don't know the details of the law either Nifty, but according to the local news report (which should include all the normal disclaimers about local news reports) it is in fact legal to go topless in Austin. Which is news to me, I never see topless girls downtown. Anyway, if that report is correct then she's got a bit of a point, they'd be pretty much making up ordinances as they went along deciding on one weekend to change the law. I'm just happy there's such a ruckus because it means boobies will be exposed, and let's all pray that the cold spell holds out through the weekend.
(I wouldn't go to MG in Austin anyway, been to it in New Orleans, an Austin version could never impress me enough to put up with the crowd).