Could this have something to do with the notification area redrawing? I've seen transparent icons get a background for a couple of seconds when doing something CPU intensive.
One icon I get almost with this issue is the printer one. Update notification sometimes is transparent, others isn't. -- Icon in the notification area is not always transparent https://launchpad.net/bugs/46203 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
