Hi Steve,
Additionally you are using version 3.0.1 and not 3.0.1.1 (http://www.stmedialearn.com/theme/essential/CHANGES.txt) as you reported. Version 3.0.1.1 has these changes:
- FIX: Issue #351: Footer doesn't stay at bottom.
- FIX: Issue #627: Request for an unknown renderer.
- FIX: Issue #628: Course content search dialog does not show up properly on RTL mode.
- FIX: Issue #629: Hidden resources have low contrast.
- FIX: Issue #633: Increase performance of administration settings pages. Thanks to 'Jan Dagefoerde' for the initial patch.
- FIX: Issue #634: Improve icon replacement performance.
- FIX: Issue #635: Course table of contents block navigation when static navbar.
- FIX: Issue #640: Edit profile style not set properly.
- FIX: Issue #641: Floating rows in the gradebook position after page scroll are wrong.
- FIX: Issue #642: Advanced Grading creating template form issue.
- FIX: Issue #643: Grading edit dropdown too small.
- FIX: Style guide settings tooltips and popups.
- FIX: MDL-52936 - Fix link hover bug on iOS.
- FIX: Apply 'aria-hidden="true"' to FontAwesome icons as much as possible. Still a few 'content' CSS attributes to consider.
- FIX: Add 'speak: none' to FontAwesome icons for accessibility.
- FIX: Footer doesn't stay at bottom code fix when no footer.
- FIX: Alternative colour border colours.
- FIX: Narrow page width and page header.
- FIX: Tidy the header.
- FIX: Admin submit button hover on alternative colour schemes.
- FIX: Dimmed icon colours.
- FIX: Hidden course summary box colours to be dimmed.
- NEW: Issue #632: View StyleGuide without logging on.
- NEW: Issue #645: Add setting to toggle display of hidden courses in Custom Menu. Thanks to Mathieu Pelletier for this code.
- NEW: Improve efficiency of colour switcher.
- NEW: Add logo width setting.
- NEW: Hide title area when showing social icons when collapsed.
- NEW: Bigger user picture when using the old navbar position and at the top.
- NEW: Refactor ColoursSwitcher into jQuery and optimise.
Which may or may not affect the outcome of the problem. I will only consider investigating issues on the current release (as published on Moodle.org) for a given Moodle version.
Gareth