*** QuickLaTeX cannot compile formula: \begin{tikzpicture} \begin{axis} \addplot3[surf,domain=0:360,samples=400] {cos(x)*cos(y)}; \end{axis} \end{tikzpicture} *** Error message: Cannot connect to QuickLaTeX server: cURL error 28: Operation timed out after 40001 milliseconds with 0 bytes received Please make sure your server/PHP settings allow HTTP requests to external resources ("allow_url_fopen", etc.) These links might help in finding solution: http://wordpress.org/extend/plugins/core-control/ http://wordpress.org/support/topic/an-unexpected-http-error-occurred-during-the-api-request-on-wordpress-3?replies=37