Created attachment 29833 [details]
Notification with graphical glitch -- button cut off
Attaching screen capture ...
The notification which appears for updates at the lower right of my screen has a graphical glitch -- there seems to be a third button to the right, but it is partially obscured by a block of white, then cut off by the edge of my screen. This is reproducible always.
I don't even know what the button is, as I can't read anything but what appears to be "no" ... I finally worked up the courage to click it a moment ago, but it just seemed to dismiss the notification.
This is a notification-daemon bug. You can reproduce it using notify-send.