Upgrading Drupal from 6 to 7 results in double slash being present in image file paths
I migrated my website from an old domain to a new one and this issue came up. Apparently, you should define new paths for website media (e.g. images) here: 

http://youwebsite.com/?q=admin/config/media/file-system 

There are two paths that must be specified. In my case,

Private: sites/youwebsite.com/private

Public: sites/youwebsite.com/files