I'm on Xubuntu 13.10 64 bit, I printed something, now the printer icon is still up there next to the battery icon, I solve the problem by logging out and in. But I want a better solution for next time that does not require me to log out.
EDIT: I'm having the same problem. As requested, here is a screenshot:
When I try to click (left or right) on the printer icon, nothing happens. Only logging out and back in again clears it away.