While DF is still the best option for a Windows 7 user, I am also disappointed in how different the DF Taskbar features remain from Windows 7.
1. When you right-click a taskbar icon, Windows 7 puts up a new custom taskbar menu. No matter how long you wait, the application window preview will never show up with the menu open - DF will put the preview over the application's right-click menu, which looks and functions poorly.
2. Without the custom taskbar menu, DF taskbars can't support jump lists, pin this program or close all windows shortcuts.
3. When a preview pane is open for a group, clicking X to close a window should not close the preview pane unless the last icon is closed in the group. When a preview pane is open for a single icon, clicking X to close the window should not close the preview pane, but show the preview for the next or previous icon remaining.
4. Aeropeek isn't implemented.
5. In the preview pane, the Window title should show above each window preview, preceded by the Window icon, instead of showing up beneath the preview after you hover over it.
6. Grouped icons should use the proper group icon, and not the foremost window's icon in the taskbar.
7. Windows 7 preview panes use a much more sophisticated animation than the DF taskbar (a simultaneous fade in/slide down into view instead of a fade in/unrolling).
8. Right-clicking a preview should open the applications system menu and bring the application to the foreground like right-clicking a single-icon does on the DF taskbar.
And, a nice extension to the Win7 taskbar would be a send to other monitor button next to the close button.
Some things to do for 3.4