I think you have to be a bit more specifik. What messages are you getting and what does it say in the Console.log/system.log? I have not seen anything on my couple of Leopard systems, so it could be a widget, a menu item, a preference pane, a wrong permission, a corrupted pref-file, an application error etc. Best wishes! Kim Den 23/12/2007 kl. 21.13 skrev Dr. Trevor J. Hutley: > Under Leopard, 10.5.11 I am "plagued' with constant messages about > the PubSubAgent..... > > I have never seen anything so common or pervasive on any earlier OS > X version. > > Even whilst watching a QuickTime movie, I get these messages > appearing on the screen.