1.7.5

Mojang has been releasing many new 1.7.x versions to Minecraft. At the time of this post we are up to 1.7.9. However, versions 1.7.6 up to 1.7.9 do not add anything but some preparation for the UUID switch. You can read more about this on the Mojang blog.
For now the Imagine Nation Server will run Spigot 1.7.5. There are two reasons for this. One, all Bukkit/Spigot builds for version 1.7.6+ are development and are not guaranteed to work. Second, the UUID changes in these versions break some plugins, specifically those that use Minecraft usernames. Essentials I have heard may be on this list so it would not work on versions 1.7.6 and above. In order to log into the server you will need to run Minecraft version 1.7.5.
Also, tonight I switched the server to Spigot. Spigot is the same (in a sense) to Bukkit but is more focused on performance and bringing lag down. For the server Spigot will bring down the lag. For you guys, you do not have to worry about a thing. Just treat it like you would Bukkit and log in with the right Minecraft Version - 1.7.5 right now.