I'm running Ubuntu 9.04, and have Pidgin's Message Notification plugin installed. I have "Set Window Manager "URGENT" hint" on, which I was expecting would flash the title bar of the message window, but it doesn't do that.
I also have the Libnotify Popups and Guifications plugins installed, but they only display a notification for fixed period of time, and if you miss it, it's gone. As far as I can tell, the only persistent notification that you have an unread IM is the tiny green dot on the envelope notification near the clock, which is very easy to overlook, and the conversation tab being highlighted in blue, which isn't useful if your IM window is behind another window.
I assume that the "URGENT" hint is being sent to the window, but that my window manager just isn't doing anything with it. Is there any way to make my window manager flash the title bar, or some other way to get a more aggressive notification that will persist until I've brought focus to the message window and viewed the message?