Every time I open Address Book, the window shrinks ever so little (2-3 pixels) down. It only shrinks vertically, never horizontally. The entire window is not moving down either. I can recreate the issue on a MacBook and an iMac running 10.5.5. Not a big issue, but after around 30 or so opens, the window is considerably smaller. This seems to be the only application with this issue. The best way to recreate the issue is place the Address Book window at the bottom of the screen and then click on the dock icon and Command+Q close the application several time rather quickly. Have a finder window or document open in the background behind the Address Book application for reference points. Very strange that this bug is still around from OS X Tiger? Any ideas. I tried deleting the .plist and starting over but no joy. Again, its not a big issue so I'm not going to fret this one, but thought it was interesting enough to post.