I have an MSM setup going on with around twenty sites.
I am trying to change the Themes Directory. I am able to change everything else in the Control Panel (System Settings -> URL and Path Settings) , but every time I try to change the themes directory, it says successfull, but reverts back to the original URL.
When you try to change a setting in the control panel and it saves but the old setting appears to ‘stick’, it’s almost always because there’s an override in the config.php file. See config overrides for the details.
The short version is- check system/user/config/config.php for:
$config['theme_folder_path'] = '/home/usr/domain.com/public_html/themes/';
You can either remove it, in which case the saved setting in the database will then determine the path, or change it there.
You are a STAR Robin, after reading some docs I thought it might have something to do with a config file, but I hadn’t seen that one so I will check that one out.