I love the Growl framework on my Mac as a way to find out an upload has finished, a backup has completed, or (as is most commonly the case) someone on my Twitter feed has posted a Tweet. I had the settings wrong, I guess, to not dismiss Growl notifications when I was away, because I came home to this:
and another entire screen and a half awaited after I cleared these!
Word to the Growl-using wise… set your notifications to be un-sticky when you’re away! That is all.