Plugin data folders are now no longer created by default.

src/main/java/org/bukkit/plugin/Plugin.java

@@ -10,7 +10,8 @@ import org.bukkit.util.config.Configuration;
  */
 public interface Plugin {
     /**
-     * Returns the folder that the plugin data's files are located in.
+     * Returns the folder that the plugin data's files are located in. The
+     * folder may not yet exist.
      * 
      * @return
      */

src/main/java/org/bukkit/plugin/java/JavaPlugin.java

@@ -42,7 +42,8 @@ public abstract class JavaPlugin implements Plugin {
     }
 
     /**
-     * Returns the folder that the plugin data's files are located in.
+     * Returns the folder that the plugin data's files are located in. The
+     * folder may not yet exist.
      * 
      * @return
      */

src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java

@@ -100,7 +100,7 @@ public final class JavaPluginLoader implements PluginLoader {
             dataFolder = new File(file.getParentFile(), filename + "_");
         }
         
-        dataFolder.mkdirs();
+        //dataFolder.mkdirs();
         
         return dataFolder;
     }