Bukkit

Server specs:
bukkit 1.5.2-r1-2788
spoutcraft 1.5.2-r0.2-snapshot-b1458.

Plugins:
MobBountyReloadedArena, VoxelSniper, PermissionsBukkit, Spout, BOSEconomy, InfoGuide, Multiverse-Core, MobBountyReloaded, MobileAdmin, Regios, dynmap, PaintedStone, More Blocks, SkylandsPlus, OpenInv, bSpace, ZavAutoMessager, MoreMaterials, CleanroomGenerator, Essentials, MobBountyReloadedDrops, WorldEdit, EssentialsProtect, EssentialsSpawn, Dynmap-Essentials, MobBountyReloadedExploits, Multiverse-Portals, Multiverse-NetherPortals, EssentialsAntiBuild, EssentialsChat, Factions, Dynmap-Factions, WirelessRedstone, Vault, LWC

Logged into server using my spoutcraft client, ran /regios and the following error:
1:01:17 AM [INFO] kwrinn67226 issued server command: /regios
1:01:17 AM [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'regios' in plugin Regios v5.9.8
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.dispatchCommand(CraftServer.java:523)
at net.minecraft.server.v1_5_R3.PlayerConnection.handleCommand(PlayerConnection.java:971)
at net.minecraft.server.v1_5_R3.PlayerConnection.chat(PlayerConnection.java:889)
at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:846)
at org.getspout.spout.SpoutPlayerConnection.a(SpoutPlayerConnection.java:120)
at net.minecraft.server.v1_5_R3.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292)
at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:115)
at org.getspout.spout.SpoutPlayerConnection.d(SpoutPlayerConnection.java:195)
at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581)
at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.ClassCastException: net.jzx7.regios.bukkit.entity.BukkitPlayer cannot be cast to org.getspout.spoutapi.player.SpoutPlayer
at net.jzx7.regios.Commands.HelpCommands.help(HelpCommands.java:19)
at net.jzx7.regios.bukkit.commands.CommandCore.onCommand(CommandCore.java:91)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
... 17 more

Installed on my test bukkit server with no plugins enabled other than regios and no errors.