Justin – first off thanks for the plugin, its very useful for me.
Regarding this change… it would be great if you supported multiple classes. Not sure what the logic for not supporting it is, but supporting it has good use cases: I am intentionally applying multiple classes to images (I have a generic alignment class, then another class to stylize images in certain sections). The ability to do that is now gone and I have to write messier CSS to support it.
Sanitize classes with sanitize_html_class() – that patch note sounded fairly innocent. I read the patch notes before applying the update but was greeted by a broken set of CSS because of the change.
I don’t mean to sound ungrateful, just want you to be aware of how many people depend on clear functionality and patch notes.
Thanks,
Zack