I just discovered that the mirror hosted by RTS-informatique has been turned off today. This situation will not change.
2014-07-20 ~ Mirror shutdown for Linux Mint
After a complaint from our host about excessive network traffic, we're sad to announce that the APT mirroring for Linux Mint (both packages and Debian) will be stopped July 30th. Please switch APT mirror by using ['mintsources']. We're very sorry for the trouble NOTE: Catalyst packages for ArchLinux will remain available.
It was one of the best mirror for LMDE... Sad news