[Voltz for Minecraft 1.5.1?]

There's this server I like to play on and it's version 1.5.1, any idea why? all the other servers are exactly the same and work just fine.

[[1.1.3] Stalrik [PvP][No Banned Items]]

Age: 14

Minecraft Name: eazycompany04

Do I have a mic: No

Skype: Don't have one

Timezone: Chicago area

Am I interesting: That's up to you to decide

Main Goal: Build a super hidden facility and kill all who oppose me

Favorite movie scene: hmmm... In Hangover when the Chinese dude jumps out of the cop car's trunk.