I’m not sure whether its WP or theme – problem, but I’ll try it there
Thank you.
apparently WP 4.2 copies ‘title’ automatically to ‘caption’ (in my case the cameratype ‘SONY DSC’ ) and this ‘caption’ is now mentioned under the photo. On IMG-uploads before WP upgrade the ‘caption’ is empty
Thank you WPyogi – your code fixed it – happy!
I’ve also tried to deactivate all plugins and I tried with default theme: doesn’t work
