I have been using ftp://ftp.iitb.ac.in/distributions/ubuntu/ Mirror for downloading new packages and updates. After Firefox 30 released, I waited for many days for my 14.04 LTS to upgrade from Firefox 29, but didn't get any upgrade.
Later I came to know that Firefox 30 is already there in Ubuntu repos. So, I switched to Main Server and got Firefox 30 and many other updates. What could be reason, why my previous mirror didn't have latest packages? If there's a problem on server side, how can the maintainers of this particular mirror be contacted?