My installation of Firefox seems to have stopped listening to the target attribute of hyperlinks. Thankfully, the middle mouse button comes to the rescue. Clicking on a link with the middle button opens it the destination page up in a new window or tab, depending on how you set your defaults. The behaviour goes even further than this: the trusty middle mouse button does the same for bookmarks and the Google search bar; all very useful. And its not just a Firefox thing either. IE7 does the same thing for web page hyperlinks and bookmarks while in Opera, it is limited links on web pages.