Bukkit build #1480 plugins used. WorldEdit, AutoSave, WorldGuard, Essentials, EssentialsSpawn, BorderGuard, Permissions, PermissionsSql, Backup, EssentialsChat, mcMMO, Factions all of these plugins are to most updated. i would like to know which ones are conflicted or why i crash. :/ i get no message. my screen just freezes. and i have to kill -9 not sure if it is bukkit or java, but i had no problems with 1.8.1
Remember that if the version you are using is not a recommended build, Bukkit doesn't really guarantee any stability. Just wait for a recommended build, it should not be too long of a wait.
I really do not think you are going to receive a response for this... you are using a test build with plugins which may be incompatible. If you wish to figure out which plugin is crashing that build, you only need yourself and to do a little bit of work to find the answer. happy hunting!
Wrong forum and the latest RB is 1337, not 1480. You need to downgrade or wait for a proper update if you want it to work right.