java.lang.NoClassDefFoundError: de/bananaco/permissions/worlds/HasPermission
at net.milkbowl.vault.permission.plugins.Permission_bPermissions.playerHas(Permission_bPermissions.java:89)
at net.milkbowl.vault.permission.Permission.has(Permission.java:87)
at org.morganm.homespawnplus.HomeSpawnPlus.hasPermission(HomeSpawnPlus.java:483)
at org.morganm.homespawnplus.HSPPlayerListener.onPlayerInteract(HSPPlayerListener.java:86)
at org.bukkit.plugin.java.JavaPluginLoader$11.execute(JavaPluginLoader.java:335)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:178)
at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.java:266)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:593)
at net.minecraft.server.Packet15Place.a(SourceFile:39)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:93)
at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:550)
at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
Caused by: java.lang.ClassNotFoundException: de.bananaco.permissions.worlds.HasPermission
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:36)
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:24)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 18 more

Looks like there have been some class changes as of 2.0

update your bPermissions.