diff --git a/direct/src/directtools/DirectManipulation.py b/direct/src/directtools/DirectManipulation.py
index d7aeb1ee3b..8a07b14702 100644
--- a/direct/src/directtools/DirectManipulation.py
+++ b/direct/src/directtools/DirectManipulation.py
@@ -1066,7 +1066,7 @@ class ObjectHandles(NodePath, DirectObject):
         # Load up object handles model and assign it to self
         self.assign(loader.loadModel('models/misc/objectHandles'))
         self.setName(name)
-        self.scalingNode = NodePath(self)
+        self.scalingNode = self.getChild(0)
         self.scalingNode.setName('ohScalingNode')
         self.ohScalingFactor = 1.0
         self.directScalingFactor = 1.0
diff --git a/dtool/src/interrogate/interfaceMakerPythonNative.cxx b/dtool/src/interrogate/interfaceMakerPythonNative.cxx
index da19170534..d719d3b549 100644
--- a/dtool/src/interrogate/interfaceMakerPythonNative.cxx
+++ b/dtool/src/interrogate/interfaceMakerPythonNative.cxx
@@ -2594,6 +2594,8 @@ write_module_class(ostream &out, Object *obj) {
     out << "    return nullptr;\n";
     out << "  }\n\n";
 
+    bool have_eq = false;
+    bool have_ne = false;
     for (Function *func : obj->_methods) {
       std::set<FunctionRemap*> remaps;
       if (!func) {
@@ -2614,8 +2616,10 @@ write_module_class(ostream &out, Object *obj) {
         op_type = "Py_LE";
       } else if (fname == "operator ==") {
         op_type = "Py_EQ";
+        have_eq = true;
       } else if (fname == "operator !=") {
         op_type = "Py_NE";
+        have_ne = true;
       } else if (fname == "operator >") {
         op_type = "Py_GT";
       } else if (fname == "operator >=") {
@@ -2640,6 +2644,43 @@ write_module_class(ostream &out, Object *obj) {
     }
 
     if (has_local_richcompare) {
+      if (have_eq && !have_ne) {
+        // Generate a not-equal function from the equal function.
+        for (Function *func : obj->_methods) {
+          std::set<FunctionRemap*> remaps;
+          if (!func) {
+            continue;
+          }
+          const string &fname = func->_ifunc.get_name();
+          if (fname != "operator ==") {
+            continue;
+          }
+          for (FunctionRemap *remap : func->_remaps) {
+            if (is_remap_legal(remap) && remap->_has_this && (remap->_args_type == AT_single_arg)) {
+              remaps.insert(remap);
+            }
+          }
+          out << "  case Py_NE: // from Py_EQ\n";
+          out << "    {\n";
+
+          string expected_params;
+          write_function_forset(out, remaps, 1, 1, expected_params, 6, true, false,
+                                AT_single_arg, RF_pyobject | RF_invert_bool | RF_err_null, false);
+
+          out << "      break;\n";
+          out << "    }\n";
+        }
+      }
+      else if (!have_eq && !slots.count("tp_compare")) {
+        // Generate an equals function.
+        out << "  case Py_EQ:\n";
+        out << "    return PyBool_FromLong(DtoolInstance_Check(arg) && DtoolInstance_VOID_PTR(self) == DtoolInstance_VOID_PTR(arg));\n";
+        if (!have_ne) {
+          out << "  case Py_NE:\n";
+          out << "    return PyBool_FromLong(!DtoolInstance_Check(arg) || DtoolInstance_VOID_PTR(self) != DtoolInstance_VOID_PTR(arg));\n";
+        }
+      }
+
       // End of switch block
       out << "  }\n\n";
       out << "  if (_PyErr_OCCURRED()) {\n";
@@ -6082,8 +6123,13 @@ write_function_instance(ostream &out, FunctionRemap *remap,
       return_flags &= ~RF_pyobject;
 
     } else if (return_null && TypeManager::is_bool(remap->_return_type->get_new_type())) {
-      indent(out, indent_level)
-        << "return Dtool_Return_Bool(" << return_expr << ");\n";
+      if (return_flags & RF_invert_bool) {
+        indent(out, indent_level)
+          << "return Dtool_Return_Bool(!(" << return_expr << "));\n";
+      } else {
+        indent(out, indent_level)
+          << "return Dtool_Return_Bool(" << return_expr << ");\n";
+      }
       return_flags &= ~RF_pyobject;
 
     } else if (return_null && TypeManager::is_pointer_to_PyObject(remap->_return_type->get_new_type())) {
@@ -6438,9 +6484,14 @@ pack_return_value(ostream &out, int indent_level, FunctionRemap *remap,
       TypeManager::is_vector_unsigned_char(type)) {
     // Most types are now handled by the many overloads of Dtool_WrapValue,
     // defined in py_panda.h.
-    indent(out, indent_level)
-      << "return Dtool_WrapValue(" << return_expr << ");\n";
-
+    if (return_flags & RF_invert_bool) {
+      indent(out, indent_level)
+        << "return Dtool_WrapValue(!(" << return_expr << "));\n";
+    }
+    else {
+      indent(out, indent_level)
+        << "return Dtool_WrapValue(" << return_expr << ");\n";
+    }
   } else if (TypeManager::is_pointer(type)) {
     bool is_const = TypeManager::is_const_pointer_to_anything(type);
     bool owns_memory = remap->_return_value_needs_management;
diff --git a/dtool/src/interrogate/interfaceMakerPythonNative.h b/dtool/src/interrogate/interfaceMakerPythonNative.h
index c667ab22fa..b387cf0001 100644
--- a/dtool/src/interrogate/interfaceMakerPythonNative.h
+++ b/dtool/src/interrogate/interfaceMakerPythonNative.h
@@ -115,6 +115,9 @@ private:
 
     // This raises a KeyError on falsey (or -1) return value.
     RF_raise_keyerror = 0x4000,
+
+    // Invert boolean return value.
+    RF_invert_bool = 0x8000,
   };
 
   class SlottedFunctionDef {
diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 588d400b1e..b792b0cf1e 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -1434,7 +1434,7 @@ def CompileFlex(wobj,wsrc,opts):
             oscmd(flex +    " -P" + pre + " -o"+wdst+" "+wsrc)
 
     # Finally, compile the generated source file.
-    CompileCxx(wobj,wdst,opts)
+    CompileCxx(wobj, wdst, opts + ["FLEX"])
 
 ########################################################################
 ##
diff --git a/panda/src/egldisplay/eglGraphicsBuffer.cxx b/panda/src/egldisplay/eglGraphicsBuffer.cxx
index ba1048b23a..2cfbff83b4 100644
--- a/panda/src/egldisplay/eglGraphicsBuffer.cxx
+++ b/panda/src/egldisplay/eglGraphicsBuffer.cxx
@@ -172,7 +172,7 @@ open_buffer() {
     }
   }
 
-  if (eglgsg->_fbconfig == None) {
+  if (eglgsg->_fbconfig == nullptr) {
     // If we didn't use an fbconfig to create the GSG, we can't create a
     // PBuffer.
     return false;
diff --git a/tests/pgraph/test_rendereffects.py b/tests/pgraph/test_rendereffects.py
new file mode 100644
index 0000000000..91751fed68
--- /dev/null
+++ b/tests/pgraph/test_rendereffects.py
@@ -0,0 +1,26 @@
+from panda3d import core
+
+
+def test_rendereffects_compare():
+    re1 = core.RenderEffects.make_empty()
+    re2 = core.RenderEffects.make_empty()
+
+    assert re1 == re1
+    assert not (re1 != re1)
+    assert not (re1 < re1)
+    assert not (re1 > re1)
+
+    assert re1 == re2
+    assert not (re1 != re2)
+    assert not (re1 < re2)
+    assert not (re1 > re2)
+
+    assert re1 != 123
+
+    rd = core.RenderEffects.make(core.DecalEffect.make())
+    assert not (re1 == rd)
+    assert not (rd == re1)
+    assert re1 != rd
+    assert rd != re1
+    assert re1 < rd or rd < re1
+    assert re1 > rd or rd > re1