Recently the WordPress team released version 3.5 of WordPress. This version feature – among many other things – a great redesign of the add media popup.
So, does Simple Fields work with WordPress 3.5? Quick answer is “yes”, while the long answer is: “yes, but you’ll be stuck with the old media popup for a while”.
I have upgraded several sites + I’ve been using the development/nightly version of WordPress during this fall, and so far I haven’t had one single problem with version 3.5. So you should be safe. And the new media popup will be supported soon too of course. Simple Fields is a project that moves slowly… slowly but steady. 🙂
Oh, and another good thing with WP 3.5 is that the attachment page now uses the regular edit post screen, so theoretically this means that you can add Simple Fields to attachments. Can be pretty useful is some situations. I haven’t tried this myself so far, but please go ahead and try it for me.