I updated to the latest GP theme the other day and it’s working fine. However, I noticed on some posts, such as this one, the search button in the top left of the navigation header does not appear like it should do on a post such as this.
I’m pretty sure its not cache or any other plugin – would you know why this is the case?
looks very much like a cache/optimization issue.
On that page, the CSS that is required for the Font Awesome icon that search button uses is not loading.
Can you flush any caches ?