Biome needs to be in the enum compatability as well.

src/main/java/com/gmail/nossr50/skills/fishing/Fishing.java

@@ -15,6 +15,7 @@ import com.gmail.nossr50.config.AdvancedConfig;
 import com.gmail.nossr50.config.treasure.TreasureConfig;
 import com.gmail.nossr50.datatypes.treasure.ShakeTreasure;
 import com.gmail.nossr50.util.Misc;
+import com.gmail.nossr50.util.adapter.BiomeAdapter;
 
 public final class Fishing {
     // The order of the values is extremely important, a few methods depend on it to work properly
@@ -57,12 +58,8 @@ public final class Fishing {
     public static int fishermansDietRankLevel2 = fishermansDietRankLevel1 * 2;
     public static int fishermansDietMaxLevel   = fishermansDietRankLevel1 * 5;
 
-    public static Set<Biome> masterAnglerBiomes = EnumSet.of(Biome.RIVER, Biome.OCEAN, Biome.DEEP_OCEAN);
-    public static Set<Biome> iceFishingBiomes = EnumSet.of(
-            Biome.FROZEN_OCEAN, Biome.FROZEN_RIVER,
-            Biome.TAIGA, Biome.TAIGA_HILLS, Biome.TAIGA_COLD_HILLS,
-            Biome.ICE_FLATS, Biome.ICE_MOUNTAINS, Biome.MUTATED_ICE_FLATS,
-            Biome.TAIGA_COLD, Biome.MUTATED_TAIGA_COLD);
+    public static Set<Biome> masterAnglerBiomes = BiomeAdapter.WATER_BIOMES;
+    public static Set<Biome> iceFishingBiomes = BiomeAdapter.ICE_BIOMES;
 
     private Fishing() {}
 

src/main/java/com/gmail/nossr50/util/adapter/BiomeAdapter.java

@@ -0,0 +1,73 @@
+package com.gmail.nossr50.util.adapter;
+
+import java.util.ArrayList;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Set;
+
+import org.bukkit.block.Biome;
+
+import com.gmail.nossr50.mcMMO;
+
+public class BiomeAdapter {
+    public static final Set<Biome> WATER_BIOMES;
+    public static final Set<Biome> ICE_BIOMES;
+    
+    static {
+        List<Biome> temp = new ArrayList<Biome>();
+        EnumSet<Biome> set = null;
+        try {
+            temp.add(Biome.valueOf("RIVER"));
+            temp.add(Biome.valueOf("OCEAN"));
+            temp.add(Biome.valueOf("DEEP_OCEAN"));
+        } catch (Exception e) {
+            temp.clear();
+        } finally {
+            try {
+                set = EnumSet.copyOf(temp);
+            } catch (IllegalArgumentException e) {
+                mcMMO.p.getLogger().severe("Biome enum mismatch");;
+            }
+            temp.clear();
+        }
+        WATER_BIOMES = set;
+        set = null;
+        try {
+            temp.add(Biome.valueOf("FROZEN_OCEAN"));
+            temp.add(Biome.valueOf("FROZEN_RIVER"));
+            temp.add(Biome.valueOf("TAIGA"));
+            temp.add(Biome.valueOf("TAIGA_HILLS"));
+            temp.add(Biome.valueOf("TAIGA_COLD_HILLS"));
+            temp.add(Biome.valueOf("TAIGA_COLD"));
+            temp.add(Biome.valueOf("MUTATED_TAIGA_COLD"));
+            temp.add(Biome.valueOf("ICE_MOUNTAINS"));
+            temp.add(Biome.valueOf("ICE_FLATS"));
+            temp.add(Biome.valueOf("MUTATED_ICE_FLATS"));
+        } catch (Exception e) {
+            temp.clear();
+            try {
+                temp.add(Biome.valueOf("FROZEN_OCEAN"));
+                temp.add(Biome.valueOf("FROZEN_RIVER"));
+                temp.add(Biome.valueOf("TAIGA"));
+                temp.add(Biome.valueOf("TAIGA_HILLS"));
+                temp.add(Biome.valueOf("TAIGA_MOUNTAINS"));
+                temp.add(Biome.valueOf("COLD_TAIGA"));
+                temp.add(Biome.valueOf("COLD_TAIGA_HILLS"));
+                temp.add(Biome.valueOf("COLD_TAIGA_MOUNTAINS"));
+                temp.add(Biome.valueOf("ICE_MOUNTAINS"));
+                temp.add(Biome.valueOf("ICE_PLAINS"));
+                temp.add(Biome.valueOf("ICE_PLAINS_SPIKES"));
+            } catch (Exception e1) {
+                temp.clear();
+            }
+        } finally {
+            try {
+                set = EnumSet.copyOf(temp);
+            } catch (IllegalArgumentException e) {
+                mcMMO.p.getLogger().severe("Biome enum mismatch");;
+            }
+            temp.clear();
+        }
+        ICE_BIOMES = set;
+    }
+}