Comment 4 for bug 193405

I changed it back to 'Firefox' in the Preferred Applications dialog, with 'Open link in new tab' selected, and now it is working.

Please note that this was a fresh hardy installation where I copied over my entire home directory from a gutsy computer, then logged in with this user. When I first noticed the incorrect behavior, 'Firefox' was selected as the preferred application, so I don't know why that didn't work in the first place. Apparently, changing it away from Firefox, then back to Firefox fixes the issue. This may still affect users upgrading from gutsy or earlier.