Yes. 3.6 Here’s the rundown:
Theme: Celestial Pro (the original, not reloaded) by Styled Themes
EDIT: I’m also using a Child Theme, but nothing fancy or weird going on there. Just a few changes to the blog template and some CSS.
Plugins:
Advanced Code Editor
Advanced Text Widget
BackupBuddy
Browser Specific CSS
Column Shortcodes
Installer (for WPML)
JetPack (for Publicize and Stats)
Post Snippets
Responsive Slider
Special Recent Posts FREE Edition
Ultimate TinyMCE
Widget Logic
WordPress Database Reset (should probably delete this — don’t need it any more)
WordPress Importer
WordPress SEO
WPML CMS Nav
WPML Multilingual CMS
WPML Sticky Links
WPML String Translation
WPML Translation Management
WP UI – Tabs, accordions and more (that’s you!)
The problem is definitely related to WP UI and it’s definitely a result of this update. Removing the plugin immediately solved the problem, and the problem does not occur when I revert to the previous version of the plugin.
Thanks.