Thread:Project:Support desk/Math display error./reply (3)

Which user your web server runs as varries depending on OS. Debian and Unbuntu generally uses www-data as the user (but no matter what user, 777 gives everything, so if it still doesn't work after that, there's something other then permissions wrong). Also be careful which temp folder. Generally MediaWiki uses images/tmp and images/math I think. Usually it puts the intermediate tex files in images/tmp and then puts the png in images/math.