How to remove speed dial screen from Opera 12
Solution 1:
In order to remove the Opera Speed Dial, type opera:config
into your Opera tab. Click on User Prefs and scroll down until you find the Speed Dial State entry. The state of Speed Dial is determined by the numeric value of its setting in the following system:
0 - Hides the Speed Dial main window on the new tab page. A small link will be displayed in the lower right corner of the screen. When you click on it, you will see the standard Speed Dial tab page again.
1 - The standard view mode.
2 - Read only mode. You cannot edit the appearance of Speed Dial.
3 - Disable Speed Dial entirely; new tabs will display the about:blank
page.
If you want to open the home page every time, simply click Alt + Home
on your keyboard when you open a new tab. Other than that, I know of no way to do so.