On the one hand I don't mind figuring out how to do it myself. On the other hand I'd really, really rather not. Has anyone already cracked this? Or determined that it's intractable and that non-css hacks are required instead?
That said, assuming it's a solvable problem if I was going to do it does anyone have an opinion on whether the right starting place would be the Zen template files or Zen Grids? Or does one of the Zen Grids alternatives deal with it? I'd like to preserve the flexibility of the grids system rather than continuously tweak individual projects.
(Finally, yes, I know Omega solves this with a checkbox. But in all other regards Zen just seems a lot cleaner. Plus it's a lot more fluidly responsive.)