LFAQ----less-frequently-asked-questions.rest

@@ -107,4 +107,9 @@ See `this thread <https://groups.google.com/d/msg/mathjax-users/-8FaQfp5Dz8/VX83
 How can I disable MathZoom.js and MathMenu.js?
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-See `this thread <https://groups.google.com/d/topic/mathjax-users/_HCDxJbCFjc/discussion>`_ -- but this won't improve rendering speed.
+See `this thread <https://groups.google.com/d/topic/mathjax-users/_HCDxJbCFjc/discussion>`_ -- but this won't improve rendering speed.
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+
+Why is MathJax waiting 15 seconds before rendering my site?
+-------------------------------------------------------------- 
+
+MathJax waits 15 seconds for resources to load. Often this is caused by an error in custom configurations, see `this thread <https://groups.google.com/d/topic/mathjax-users/LFXTIz4RmvA/discussion>`_.
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