Makes Command-Click open a new tab on pages that don't do it properly.
You can see this for yourself here: http://getglue.com/books/design_of_everyday_things/donald_norman
Try to Command-click on any of the "Similar" items in the sidebar. They all open in the current tab.
If you install this extension and refresh the page, they open in a new tab. Just like you said they should.
Disclaimer: This is a little bit of a hack. It might mess things up a bit, though I don't expect it to. If you have any trouble clicking on links, disable the extension, refresh the page, and see if it helps. If it does, please let me know on the support page.