Because lowercase class names are just wrong...

src/main/java/com/gmail/nossr50/commands/mc/McrankCommand.java

@@ -9,7 +9,7 @@ import org.bukkit.entity.Player;
 import com.gmail.nossr50.config.Config;
 import com.gmail.nossr50.datatypes.SkillType;
 import com.gmail.nossr50.locale.LocaleLoader;
-import com.gmail.nossr50.runnables.mcRankAsync;
+import com.gmail.nossr50.runnables.McRankAsync;
 import com.gmail.nossr50.util.Leaderboard;
 import com.gmail.nossr50.util.Skills;
 
@@ -75,6 +75,6 @@ public class McrankCommand implements CommandExecutor {
 
 
     private void sqlDisplay(CommandSender sender, String playerName) {
-        Bukkit.getScheduler().runTaskAsynchronously(Bukkit.getPluginManager().getPlugin("mcMMO"), new mcRankAsync(playerName, sender));
+        Bukkit.getScheduler().runTaskAsynchronously(Bukkit.getPluginManager().getPlugin("mcMMO"), new McRankAsync(playerName, sender));
     }
 }

src/main/java/com/gmail/nossr50/runnables/mcRankAsync.java → src/main/java/com/gmail/nossr50/runnables/McRankAsync.java

@@ -11,12 +11,12 @@ import com.gmail.nossr50.locale.LocaleLoader;
 import com.gmail.nossr50.util.Database;
 import com.gmail.nossr50.util.Skills;
 
-public class mcRankAsync implements Runnable {
+public class McRankAsync implements Runnable {
     private Database database = mcMMO.getPlayerDatabase();
     private final String playerName;
     private final CommandSender sender;
 
-    public mcRankAsync(String playerName, CommandSender sender) {
+    public McRankAsync(String playerName, CommandSender sender) {
         this.playerName = playerName;
         this.sender = sender;
     }