Using a non tabbed dock with the taskbar items showing, the task items in the dock don't operate correctly. First, many times (every time?) when starting a program, it gets put in the task bar with no icon. The icon is corrected if I select it twice (which minimizes the application and then restores it). I also have to do the same when switching to a different application using the task bar items in the dock (click them twice, once to minimize and the 2nd time to restore them) before they'll actually come to the foreground for me to work them. This doesn't happen every time, but often enough.