You can remove or configure the Pidgin pop up’s that you see from pidgin. Buddies logging on/off, and in my case, new messages. I didn’t want every new message i receive to be blasted up on the desktop OSD. To control what you see there, Pull up your Pidgin window (buddy window, not your conversation box), then: Tools -> Plugins -> Libnotify Popups. When you have selected the libnotify pop-ups, click on “configure plug-in”. That will give you some check boxes to customize the behaviour