You can still open a link in a new window in most browsers by holding down [Shift] when clicking. In Opera you can go a step further by holding down [Ctrl]+[Shift] and clicking as it will open the new page behind the existing one and you don't have to move focus back to the first window. That's actually my preferred method as it's quicker than rt-clicking and selecting new window, especially if you're opening many gallery image pages at the same time (I do the same as you do leather-guy.)