Starting sometime today, you can customize how your subscriptions display on your subscriptions page.
On your Subscriptions page you currently see a list of all the threads you're subscribed to; if there have been new posts since your last visit, their titles will be in bold. Some of you have asked to ONLY see threads that have new posts, so we made this a view option that users can control. We decided it was not a good idea to force a change to the default behavior platform wide, but you can go into the Edit My Subscriptions area to enable this change if you prefer it this way. Go to your Profile, Edit Account Details, Email Preferences to find the Edit My Subscriptions link.