This is really an outstanding plugin! It's amazingly versatile and has allowed me to do things I've struggled to do in WordPress for a long time. If there were a Nobel Prize for WP plugins, I'd nominate you!
Just one question. I am using the shortcode version of the plugin on a page, and I need to include alt text on the images for accessibility. The [ml_image] shortcode does not have an alt text attribute. Any workarounds?