This is exactly the sort of thing I'm looking for, as I really want to keep the hierarchical Dock folder behaviour in Leopard.

OldFolder is the first attempt I've seen to bring this behaviour back and is thus very much appreciated and most useful. However, there are few ways in which it could be better. Particularly (in descending order of importance):

1. As yet, it doesn't support aliases to folders. One of my Dock folders (which used to be extremely useful, and is now utterly useless as a stack) is a folder full of folder aliases, so that I can easily collect together ways of accessing different directories. OldFolder just shows these as top-level folder names, just as the equivalent stack does, and it fails to allow me to navigate the contents of the folders. So, support for aliases needs to be added.

2. There are no icons against the names, which makes it much less easy to see what's what.

3. It's a shame that the icon has to appear intermingled with applications rather than in the 'folder' side of the Dock, but I suppose that's unavoidable.

4. The default click behaviour is to open the window offering a Quit option or to choose a new folder. In the old Dock folders I could hold down the mouse button to get the hierarchical menu, and it would be nice if OldFolder could also do this with an unmodified click.