I started using Activity Monitor very frequently once I found out I could quit the Dock to free up memory taken up by my widgets. I used it so often I put it in my dock. Now (starting a couple of days ago), when I click on Activity Monitor (in the Dock or the Utilities folder) it will not open. However, I'm expecting a copy of Leopard in the mail in a couple days (I'm currently running Tiger 10.4.11). I'm assuming installing Leopard will get rid of this problem (please correct me if I'm wrong). What I'd like to know if there was something I did (by using it too much, leaving it open, etc.) to cause Activity Monitor to stop working and what I need to do to prevent it from happening again, or if this was just a one time glitch. Any feedback would be appreciated!