As I am testing this version one thing I find missing is Home button from the toolbar :-
If you want it back then do this :-
- Open Opera 12 Pre Alpha version,
- Now press Shift + F12 to open Appearance setting,
- Now click on Button tab and click on Browser option,
- Now there you will see many buttons, just Drag and Drop the Home button to your Toolbar
- That’s it now close Appearance dialog box and enjoy.