I wonder if Apple purposely screws over Mighty Mouse owners so that they buy the Magic Mouse. Let me explain: I recently updated my system, running the version that supports the Magic Mouse. Ever since then my Mighty Mouse has been sh!t. I had my MM set up such that left and right buttons are primary clicks, and center button is secondary click. Now, no matter where I click the mouse, a secondary click is initiated. So I went into System Preferences and put the center button as a primary click as well. Not happy about this. Even though I do intend on getting a Magic mouse, this is just annoying as my MM has been doing well for the thirteen months I've had it now (only maintenance is a simple scroll ball cleanse every now and then via holding it upside-down and rolling it on paper). This probably is a coincidence but erggh.