I tracked down an error about \iint already being defined to a clash between wasysym and amsmath. I brought in amsmath, but it appears that wasysym is an Org LaTeX export default package.
What is it's purpose? Is there a better way round this than just commenting out the wasysym package in the .tex file manually? I forget exactly what I use from amsmath, but I do use it a reasonable amount through my documents so I keep #+latex_header: \usepackage{amsmath} in my setupfile. This doesn't appear to be a major problem with respect to export, but it does trigger [LaTeX error] in the minibuffer, so I have to check to see if it was something to care about or not. John