I've just upgraded from 14.10 to 15.10 and my power indicator applet is messed up. It shows up on my panel as a red circle with an exclamation point in it. I've tried it with different icon themes, and it shows up in some as an orange triangle. The laptop battery is fully-charged and my mouse battery is at 90%. Before, when my laptop battery was low, the icon was a normal battery, but empty and red. I've reinstalled indicator-power, and that didn't fix it. Any ideas?