diff --git a/src/java/com/threerings/presents/tools/GenDObjectTask.java b/src/java/com/threerings/presents/tools/GenDObjectTask.java
index 023ded8bb..f002cc5ea 100644
--- a/src/java/com/threerings/presents/tools/GenDObjectTask.java
+++ b/src/java/com/threerings/presents/tools/GenDObjectTask.java
@@ -211,7 +211,7 @@ public class GenDObjectTask extends Task
             // if this field is an array, we need its component types
             if (ftype.isArray()) {
                 Class<?> etype = ftype.getComponentType();
-                ctx.put("elemtype", GenUtil.simpleName(etype, null));
+                ctx.put("elemtype", GenUtil.simpleName(etype));
                 ctx.put("wrapelem", GenUtil.boxArgument(etype, "value"));
                 ctx.put("wrapoelem", GenUtil.boxArgument(etype, "ovalue"));
             }
@@ -219,8 +219,7 @@ public class GenDObjectTask extends Task
             // if this field is a generic DSet, we need its bound type
             if (_dsclass.isAssignableFrom(ftype)) {
                 Type t = f.getGenericType();
-                // we need to walk up the heirarchy until we get to the
-                // parameterized DSet
+                // we need to walk up the heirarchy until we get to the parameterized DSet
                 while (t instanceof Class<?>) {
                     t = ((Class<?>)t).getGenericSuperclass();
                 }
@@ -228,8 +227,7 @@ public class GenDObjectTask extends Task
                     ParameterizedType pt = (ParameterizedType)t;
                     if (pt.getActualTypeArguments().length > 0) {
                         ctx.put("etype", GenUtil.simpleName(
-                                    (Class<?>)pt.getActualTypeArguments()[0],
-                                    null));
+                                    (Class<?>)pt.getActualTypeArguments()[0]));
                     }
                 } else {
                     ctx.put("etype", "DSet.Entry");
diff --git a/src/java/com/threerings/presents/tools/GenServiceTask.java b/src/java/com/threerings/presents/tools/GenServiceTask.java
index c671e6783..38aa8e0f1 100644
--- a/src/java/com/threerings/presents/tools/GenServiceTask.java
+++ b/src/java/com/threerings/presents/tools/GenServiceTask.java
@@ -103,7 +103,7 @@ public class GenServiceTask extends InvocationTask
 
         public String getName ()
         {
-            String name = GenUtil.simpleName(listener, null);
+            String name = GenUtil.simpleName(listener);
             name = StringUtil.replace(name, "Listener", "");
             int didx = name.indexOf(".");
             return name.substring(didx+1);
@@ -608,10 +608,8 @@ public class GenServiceTask extends InvocationTask
                 Class[] args = m.getParameterTypes();
                 for (int aa = 0; aa < args.length; aa++) {
                     if (_ilistener.isAssignableFrom(args[aa]) &&
-                        GenUtil.simpleName(
-                            args[aa], null).startsWith(sname + ".")) {
-                        checkedAdd(listeners, new ServiceListener(
-                                       service, args[aa]));
+                        GenUtil.simpleName(args[aa]).startsWith(sname + ".")) {
+                        checkedAdd(listeners, new ServiceListener(service, args[aa]));
                     }
                 }
                 if (_verbose) {
diff --git a/src/java/com/threerings/presents/tools/GenUtil.java b/src/java/com/threerings/presents/tools/GenUtil.java
index 57912ed0b..ddb043872 100644
--- a/src/java/com/threerings/presents/tools/GenUtil.java
+++ b/src/java/com/threerings/presents/tools/GenUtil.java
@@ -110,28 +110,28 @@ public class GenUtil extends com.samskivert.util.GenUtil
      * "Unboxes" the supplied argument, ie. turning an <code>Integer</code> object into an
      * <code>int</code>.
      */
-    public static String unboxArgument (Class<?> clazz, Type type, String name)
+    public static String unboxArgument (Type type, String name)
     {
-        if (clazz == Boolean.TYPE) {
+        if (Boolean.TYPE.equals(type)) {
             return "((Boolean)" + name + ").booleanValue()";
-        } else if (clazz == Byte.TYPE) {
+        } else if (Byte.TYPE.equals(type)) {
             return "((Byte)" + name + ").byteValue()";
-        } else if (clazz == Character.TYPE) {
+        } else if (Character.TYPE.equals(type)) {
             return "((Character)" + name + ").charValue()";
-        } else if (clazz == Short.TYPE) {
+        } else if (Short.TYPE.equals(type)) {
             return "((Short)" + name + ").shortValue()";
-        } else if (clazz == Integer.TYPE) {
+        } else if (Integer.TYPE.equals(type)) {
             return "((Integer)" + name + ").intValue()";
-        } else if (clazz == Long.TYPE) {
+        } else if (Long.TYPE.equals(type)) {
             return "((Long)" + name + ").longValue()";
-        } else if (clazz == Float.TYPE) {
+        } else if (Float.TYPE.equals(type)) {
             return "((Float)" + name + ").floatValue()";
-        } else if (clazz == Double.TYPE) {
+        } else if (Double.TYPE.equals(type)) {
             return "((Double)" + name + ").doubleValue()";
-        } else if (clazz.equals(Object.class)) {
+        } else if (Object.class.equals(type)) {
             return name; // no need to cast object
         } else {
-            return "(" + simpleName(clazz, type) + ")" + name;
+            return "(" + simpleName(type) + ")" + name;
         }
     }
 
@@ -188,16 +188,16 @@ public class GenUtil extends com.samskivert.util.GenUtil
     /**
      * Potentially clones the supplied argument if it is the type that needs such treatment.
      */
-    public static String cloneArgument (Class<?> dsclazz, Field f, String name)
+    public static String cloneArgument (Class<?> dsclazz, Field field, String name)
     {
-        Class<?> clazz = f.getType();
+        Class<?> clazz = field.getType();
         if (dsclazz.equals(clazz)) {
             return "(" + name + " == null) ? null : " + name + ".typedClone()";
         } else if (clazz.isArray()) {
             return "(" + name + " == null) ? null : " + name + ".clone()";
         } else if (dsclazz.isAssignableFrom(clazz)) {
             return "(" + name + " == null) ? null : " +
-                "(" + simpleName(f) + ")" + name + ".clone()";
+                "(" + simpleName(field) + ")" + name + ".clone()";
         } else {
             return name;
         }
diff --git a/src/java/com/threerings/presents/tools/InvocationTask.java b/src/java/com/threerings/presents/tools/InvocationTask.java
index 486c63748..1ed1b990a 100644
--- a/src/java/com/threerings/presents/tools/InvocationTask.java
+++ b/src/java/com/threerings/presents/tools/InvocationTask.java
@@ -71,7 +71,7 @@ public abstract class InvocationTask extends Task
 
         public String getMarshaller ()
         {
-            String name = GenUtil.simpleName(listener, null);
+            String name = GenUtil.simpleName(listener);
             // handle ye olde special case
             if (name.equals("InvocationService.InvocationListener")) {
                 return "ListenerMarshaller";
@@ -147,13 +147,12 @@ public abstract class InvocationTask extends Task
         public String getArgList (boolean skipFirst)
         {
             StringBuilder buf = new StringBuilder();
-            Class<?>[] args = method.getParameterTypes();
             Type[] ptypes = method.getGenericParameterTypes();
-            for (int ii = skipFirst ? 1 : 0; ii < args.length; ii++) {
+            for (int ii = skipFirst ? 1 : 0; ii < ptypes.length; ii++) {
                 if (buf.length() > 0) {
                     buf.append(", ");
                 }
-                buf.append(GenUtil.simpleName(args[ii], ptypes[ii]));
+                buf.append(GenUtil.simpleName(ptypes[ii]));
                 buf.append(" arg").append(skipFirst ? ii : ii+1);
             }
             return buf.toString();
@@ -218,14 +217,12 @@ public abstract class InvocationTask extends Task
         public String getUnwrappedArgList (boolean listenerMode)
         {
             StringBuilder buf = new StringBuilder();
-            Class<?>[] args = method.getParameterTypes();
             Type[] ptypes = method.getGenericParameterTypes();
-            for (int ii = (listenerMode ? 0 : 1); ii < args.length; ii++) {
+            for (int ii = (listenerMode ? 0 : 1); ii < ptypes.length; ii++) {
                 if (buf.length() > 0) {
                     buf.append(", ");
                 }
-                buf.append(unboxArgument(args[ii], ptypes[ii],
-                               listenerMode ? ii : ii-1, listenerMode));
+                buf.append(unboxArgument(ptypes[ii], listenerMode ? ii : ii-1, listenerMode));
             }
             return buf.toString();
         }
@@ -274,14 +271,13 @@ public abstract class InvocationTask extends Task
             }
         }
 
-        protected String unboxArgument (
-            Class<?> clazz, Type type, int index, boolean listenerMode)
+        protected String unboxArgument (Type type, int index, boolean listenerMode)
         {
-            if (listenerMode && _ilistener.isAssignableFrom(clazz)) {
+            if (listenerMode && (type instanceof Class) &&
+                _ilistener.isAssignableFrom((Class)type)) {
                 return "listener" + index;
             } else {
-                return GenUtil.unboxArgument(
-                    clazz, type, "args[" + index + "]");
+                return GenUtil.unboxArgument(type, "args[" + index + "]");
             }
         }
     }