@KyleCronin @stuffe @jaberg No, that's a Control symbol. Shift is a full arrow. Control-Command-Space brings up a miniature Keyboard Palette, with your favorite symbols right there! No more hunting around for keyboard shortcut icons. :)
But I came here with a question: How does the Google+ Hangouts app remove push notifications you've read on other devices? I can't find that in the push API.