I just tried TeXLive on latest Fedora with the latest Git repository of the math extension, latest Wikimedia 1.20.2. And it is failing with the same error as I was getting with the old one on Fedora 14 and Wikimedia 1.18.2 Failed to parse (PNG conversion failed; check for correct instillation of latex and dvipng (or dvips + gs + convert)): a=b+c I have convert, gs, dvips, and dvipng all installed and working on the command line. I am wondering if I am doing something rather basic wrong or whether the maths extension is just broken ? Any help welcome,

Aaron