(updated with screen shot)
I was happy to see that sp1 was available for Office 2007, as typically office patches are tested well. So far I’ve been very unhappy with the stability of Outlook 2007 after sp1. I constantly have “painting errors” where outlook’s task bar on the 
bottom of the screen is shown on top of my quick launch bar. I move my mouse over it and the quick-launch icons are painted properly, however, whenever this happens I am no longer able to pull up the outlook window. Vista shows the animation of minimize & restore, but no window is ever shown. The only way to recover is to right-click on the task-bar and select close. It happens 1+ times a day, which makes it incredibly annoying. Prior to sp1 this never happened. I’ve seen two other problems, but they happened only once each. I found another article talking about another known problem with no fix: http://techlogg.com/content/view/468/
