On a new Aluminum iMac (that has been running Leopard fine for a month or so) the computer is starting to act very strange. I first noticed that when click on something in the menu bar, it does not highlight whatever my mouse is over. For example, if I click on File, and then move my mouse down to an option below, File is highlighted but the options I mouse over do not highlight like they used to. Also, whenever I launch an application the application opens but is in the background, and finder is now the active application. Another thing is that whenever hovering over the dock, the dock does not move/resize like it usually does. Instead, it does nothing until you click on an application. As soon as you click on an app, the dock instantly changes to be zoomed in with name appearing above the app, and then after a second or two it goes back to normal. To rephrase that another way, it doesn't do "the wave" or show applications names when mousing over the dock. Does anyone have any idea what the heck is happening? I tried repairing permissions and checking the drive for errors with Disk Utility. Nothing... Anyone? I'm not sure exactly when this started... other than that it happened in the last day or two.