Help all of a sudden I can't open my address book!?!
I can't open my address book. Whe I click on it and the menu bar on the top changes to address book but nothing shows on my screen. If I right click and choose "show all windows" then it appears but disappears when I try to click on it to use it. Any ideas how I could fix this? I have tried shutting down and restarting my computer.
MacBook Air, Mac OS X (10.7.3)