URLs in mailing are not absolute, even {mailing.viewUrl}

[richmahn]

Hi. Hope someone can help me. I was using CiviCRM 4.4 all last year and had no problems with mailings, that is, with URLs in the emails for images and other links being just fine, absolute URLs back to the server.

Now after upgrading to 4.5 (and currently at 4.5.2) ALL the links are relative, even the {mailing.viewUrl} link that the placeholder generates. What should be

http://www.example.com/civicrm/mailing/view?reset=1&id=81

Is just

civicrm/mailing/view?reset=1&id=81

Am I missing something? Do I need to specify the site's domain name/url somewhere? I never had to before. This was all working before 4.5. Appreciate your help.