In the Mac dock, the "running" arrow appears under a shortcut to show that it is running. In ObjectDock the arrow appears AND the program icon also appears in the taskbar area. This defeats the whole purpose of the arrows IMHO... If there is a shortcut for a program in the dock, then only the arrow should appear and the program should be hidden from the taskbar. Having running programs twice on the dock takes lots of space and is not very useful...
Also, it would be nice if you could set programs to be shown on the taskbar only when minimized, the Mac way. (I have a feeling like I've seen this functionality before, but maybe it was in some other dock application...?)