Hi Matt,
Thanks for your response.
In answer to your questions, we are setup with php version 4.0.8 by our hosting provider who is TMD Hosting (shared). We noticed 4.1.8 is available so we’ll attempt to upgrade and see if this resolves the issue.
With reference to the plugins utilised, actually we ran a clean install without any plugins installed or activated. So the theme Circles 3.5 by Theme Smack was running as a fresh default install without any mods or tweaks, yet we still encountered this problem. Definitely ‘Advanced Custom Fields’ is not installed.
Many thanks