In Safari 5.1 again: Hitting backspace in any editor window with text selected appears to cause a 'back' event in the browser rather than deleting the selected text as expected (ie. leaving the page and returning to the previous page). Without text selected and the cursor present backspace works normally.I'm scratching my head a bit because the bserved behaviour is what you might expect if the tab (rather than any page element) has the focus, but selecting the text in the editor should be enough to set focus to the editor.