This article is deprecated! Any technical information refers to software versions that are now obsolete. Please visit the DIYthemes Blog for current updates, or check out the old Thesis Blog for a treasure trove of website marketing insights.
If you’re still using Thesis 1.x, you’ll be happy to know we’ve released Thesis 1.8.6 for full WordPress 4.0 compatibility.[edit: link removed because Thesis 1.x is no longer available]
Finally, just to be clear—if you’re using Thesis 2, your site is fully compatible with WordPress 4.0, so there is no need to update anything.