Microsoft IE difficulty: bring up a new tab when clicking on a link in Outlook Express

One problem with the new IE 7 Beta 2 Preview that I haven't resolved is that I get a whole new IE window when I click on a link in an email message in Outlook Express. Firefox had an option to control whether a tab or new window would be opened in this situation, but I've been unable to find a similar option in IE. Sigh.

If you know the answer, just comment here and then everybody can be clued in to the secret incantations that are necessary.

-- Jack Krupansky