We're finding that for some https pages, up-to-date versions of Firefox and Chrome are not loading the stylesheets (IE9 is not affected). The Chrome console shows a number of messages such as:
[blocked] The page at https://moodle.yorksj.ac.uk/my/ ran insecure content from http://moodle.yorksj.ac.uk/theme/yui_combo.php?3.2.0/build/cssreset/reset-min.css&3.2.0/build/cssfonts/fonts-min.css&3.2.0/build/cssgrids/grids-min.css&3.2.0/build/cssbase/base-min.css.
This is not happening in 2.3.1 on our test server, but it will be a few months until we can upgrade. Is there a reasonably easy fix for this?