diff --git a/MCGalaxy/Player/Group/Group.cs b/MCGalaxy/Player/Group/Group.cs
index b2e4720a3..ea720d472 100644
--- a/MCGalaxy/Player/Group/Group.cs
+++ b/MCGalaxy/Player/Group/Group.cs
@@ -21,6 +21,7 @@ using System.IO;
 using MCGalaxy.Blocks;
 using MCGalaxy.Commands;
 using MCGalaxy.Events.GroupEvents;
+using BlockID = System.UInt16;
 
 namespace MCGalaxy {
     /// <summary> This is the group object, where ranks and their data are stored </summary>
@@ -54,7 +55,7 @@ namespace MCGalaxy {
         
         public PlayerList Players;
         public List<Command> Commands;
-        public bool[] Blocks = new bool[256];
+        public bool[] Blocks = new bool[Block.ExtendedCount];
         public Group() { }
         
         private Group(LevelPermission perm, int maxB, int maxUn, string name, char colCode) {
@@ -73,8 +74,9 @@ namespace MCGalaxy {
         }
         
         public void SetUsableBlocks() {
-            for (int i = 0; i < Blocks.Length; i++)
-                Blocks[i] = BlockPerms.UsableBy(Permission, (byte)i);
+            for (int i = 0; i < Blocks.Length; i++) {
+                Blocks[i] = BlockPerms.UsableBy(Permission, (BlockID)i);
+            }
         }
 
         public bool CanExecute(Command cmd) { return Commands.Contains(cmd); }
diff --git a/MCGalaxy/util/Math/AABB.cs b/MCGalaxy/util/Math/AABB.cs
index 791c947e6..39118ccab 100644
--- a/MCGalaxy/util/Math/AABB.cs
+++ b/MCGalaxy/util/Math/AABB.cs
@@ -140,7 +140,7 @@ namespace MCGalaxy.Maths {
             if (model.CaselessEq("head"))     return new Vec3S32(31, 31, 31);
             if (model.CaselessEq("pig"))      return new Vec3S32(28, 28, 28);
             if (model.CaselessEq("sheep"))    return new Vec3S32(20, 40, 20);
-            if (model.CaselessEq("skeleton")) return new Vec3S32(16, 60, 16);
+            if (model.CaselessEq("skeleton")) return new Vec3S32(16, 56, 16);
             if (model.CaselessEq("spider"))   return new Vec3S32(30, 24, 30);
             
             return new Vec3S32(18, 56, 18); // default humanoid size