> Here's an example, using the "example" environment from > powerdot-example3.tex. It dies with: > > ! Argument of \lst@next has an extra }. > <inserted text> > \par > l.9 } Unfortunately, I don't think it's possible what you want, sorry. \twocolumn indeed doesn't allow for such things. Put the listing in a temp box (outside the slide) and use that in the \twocolumn. Good luck, -Hendri.