And if we have multiple portlets on a page and minimize one of them, it seems like the title of the minimized portlet is set to the value of the previous portlet.

Now you enter the possibility of conflict: the same-style name-like title could be used in multiple places, but with different values.

If you're using X-Windows, yet another smart way to keep track of the current folder is to display the folder name on the title bar of the xterm as you work your way across multiple folders.