What is the best way to manage the ExpressionEngine themes folder with an MSM setup which includes multiple domains?
Currently, I am copying/mirroring the themes folder across all site folders contained in the MSM setup. This tends to work fairly well as long as I set the 'URL to your "themes" folder' and the 'Theme Folder Path' in the Admin section of the CP for each site accordingly, and remember to copy the update files across all domains each time one is added or updated.
My problem is getting a cross-domain access error with js if one of those steps is forgotten or fails. Is there a better way of managing fieldtypes, extensions, etc. where I could keep everything located near the system files and not get these errors when using MSM?