CiviMail Tracked Click Throughs not Redirecting
This is a known bug in CiviCRM 4.7.1, and it's been fixed in 4.7.2 - which hasn't been released as of this writing.  However, if you're comfortable applying the patch, the fix has been released.  See https://issues.civicrm.org/jira/browse/CRM-17953 for details.