It only seems to work on like My Documents, and My Pictures and folders. It won't work on Chrome, FireFox, Safari, or Opera? I have XP Pro SP3.
Which Firefox are you using? My guess is, LeftSider is only changing the buttons drawn by Windows. Chrome has it's own buttons and Firefox 4.0 draws the top bar differently (if FF4 locks up or is unresponsive before/during the startup you'll see it draw a border that is below the "actual" top of the Firefox window). I don't use anything Apple, so no clue about Safari... and I gave up on the overly complex Opera a long time ago.
