In reply to Jeffro.

I use custom icon images for Custom Post Types on sites of clients and since 3.8 I have changed all those into dashicons.

I think plugin developers who have made the effort to give their plugin a separate top level menu in the sidebar, should now also step up and change their image into something that can be used on all admin color schemes.

What I find a little disappointing though is the way that is supposed to be done. I mean I have read the linked "instructions" post of March last year and it's good that none of my plugins have their own top level menu, because I would not make the effort to change anything anytime soon!

Why can't it be done by adding a dashicon, or any other icon-font for that matter? Really if you want the masses to adapt quickly, then you need to keep it simple imo.