“it seems, that the ‘get_image_tag()’ function (and the filter ‘get_image_tag_class’) in media.php only gets applied when an image is inserted into a post for the first time (not even if the image is updated)”
Wow, thank you so much for mentioning that, I’ve been banging my head against this for a while and I don’t know how much longer it would have taken me to figure that out myself. I haven’t seen anything that talks about it mention that, so I’d assumed, since it’s part of my theme, that it would apply when it displays.
