David Scotson

These appear (from checking on the 2014.imoot.org site and then github) to be two (very slightly) different images. You're probably best to tell Julian, so that he can just use the better one.

If you're in a hurry you can probably copy the one from the pix folder over the one in the pix_core folder.

In the docs for this, they use a theme called "demystified" and use "theme_demystified" where you've only used the theme name alone: for $name = 'my_theme/tilefallback';

http://docs.moodle.org/dev/Creating_a_theme_settings_page

Don't know if that's the problem, but I'd try it to see.

Have you checked for subtle typos between the name the settings are stored under and the name that the theme is looking for?

In the example you give in another comment you have both "my_theme/tilefallback' and get_string('tilefallback', 'theme_my_theme') with "theme_my_theme" probably being the correct one (though probably you just changed those for the purposes of sharing online).

Yep, that looks like a good start. It just means that Moodle thinks your theme doesn't have any settings.

Assuming your theme actually has some settings, I think you might need to bump the theme version number after you add them, and then visit the site update page in order to have them inserted into the database, or even just change a few settings and then save the page?

If you right-click on the alerts in Chrome or Firefox, and select Examine Element you should be able to see what classes and styles are affecting it.

I'm guessing that a class is added once you're logged in that is accidentally affecting things, so try it before and after loggin in and see what changes. I don't have an Essential site handy to test on though (and it may be something specific to your site anyway).