In Safari 6, the keyboard shortcut ⌘ Command-1 opens the first bookmark on the bookmark bar. In Safari 5 I used a macro activated by that same shortcut to activate ⌘ Commmand-] to go forward a page.
The reason is that I have another macro activated by the shortcut ⌘ Command-` to go back a page. It is convenient to use one hand and the two adjacent keys: thumb on the ⌘ Commandkey, middle finger on the ` and 1 keys.
How can this key binding in Safari 6 be changed?