diff --git a/widget/src/cocoa/nsNativeThemeCocoa.h b/widget/src/cocoa/nsNativeThemeCocoa.h
index e79d175263ea..7952bee69103 100644
--- a/widget/src/cocoa/nsNativeThemeCocoa.h
+++ b/widget/src/cocoa/nsNativeThemeCocoa.h
@@ -123,7 +123,7 @@ protected:
                   PRBool inDisabled, ThemeButtonValue inValue,
                   ThemeButtonAdornment inAdornment, PRInt32 inState, nsIFrame* aFrame);
   void DrawDropdown(CGContextRef context, const HIRect& inBoxRect, PRInt32 inState,
-                    PRBool aIsEditable, nsIFrame* aFrame);
+                    PRUint8 aWidgetType, nsIFrame* aFrame);
   void DrawSpinButtons(CGContextRef context, ThemeButtonKind inKind,
                        const HIRect& inBoxRect,
                        PRBool inDisabled, ThemeDrawState inDrawState,
diff --git a/widget/src/cocoa/nsNativeThemeCocoa.mm b/widget/src/cocoa/nsNativeThemeCocoa.mm
index d8474311927a..fa1f661f6f7d 100644
--- a/widget/src/cocoa/nsNativeThemeCocoa.mm
+++ b/widget/src/cocoa/nsNativeThemeCocoa.mm
@@ -866,18 +866,21 @@ static const CellRenderSettings editableMenulistSettings = {
 
 void
 nsNativeThemeCocoa::DrawDropdown(CGContextRef cgContext, const HIRect& inBoxRect,
-                                 PRInt32 inState, PRBool aIsEditable, nsIFrame* aFrame)
+                                 PRInt32 inState, PRUint8 aWidgetType, nsIFrame* aFrame)
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
 
-  NSCell* cell = aIsEditable ? (NSCell*)mComboBoxCell : (NSCell*)mDropdownCell;
+  [mDropdownCell setPullsDown:(aWidgetType == NS_THEME_BUTTON)];
+
+  BOOL isEditable = (aWidgetType == NS_THEME_DROPDOWN_TEXTFIELD);
+  NSCell* cell = isEditable ? (NSCell*)mComboBoxCell : (NSCell*)mDropdownCell;
 
   [cell setEnabled:!IsDisabled(aFrame)];
   [cell setShowsFirstResponder:(IsFocused(aFrame) || (inState & NS_EVENT_STATE_FOCUS))];
   [cell setHighlighted:((inState & NS_EVENT_STATE_ACTIVE) && (inState & NS_EVENT_STATE_HOVER))];
   [cell setControlTint:(FrameIsInActiveWindow(aFrame) ? [NSColor currentControlTint] : NSClearControlTint)];
 
-  const CellRenderSettings& settings = aIsEditable ? editableMenulistSettings : dropdownSettings;
+  const CellRenderSettings& settings = isEditable ? editableMenulistSettings : dropdownSettings;
   DrawCellWithSnapping(cell, cgContext, inBoxRect, settings,
                        0.5f, NativeViewForFrame(aFrame), IsFrameRTL(aFrame));
 
@@ -1588,6 +1591,8 @@ nsNativeThemeCocoa::DrawWidgetBackground(nsIRenderingContext* aContext, nsIFrame
       if (IsDefaultButton(aFrame)) {
         DrawButton(cgContext, kThemePushButton, macRect, true, IsDisabled(aFrame), 
                    kThemeButtonOff, kThemeAdornmentNone, eventState, aFrame);
+      } else if (IsButtonTypeMenu(aFrame)) {
+        DrawDropdown(cgContext, macRect, eventState, aWidgetType, aFrame);
       } else {
         DrawPushButton(cgContext, macRect, IsDisabled(aFrame), eventState, aFrame);
       }
@@ -1664,8 +1669,7 @@ nsNativeThemeCocoa::DrawWidgetBackground(nsIRenderingContext* aContext, nsIFrame
 
     case NS_THEME_DROPDOWN:
     case NS_THEME_DROPDOWN_TEXTFIELD:
-      DrawDropdown(cgContext, macRect, eventState,
-                   (aWidgetType == NS_THEME_DROPDOWN_TEXTFIELD), aFrame);
+      DrawDropdown(cgContext, macRect, eventState, aWidgetType, aFrame);
       break;
 
     case NS_THEME_DROPDOWN_BUTTON:
@@ -1893,7 +1897,11 @@ nsNativeThemeCocoa::GetWidgetBorder(nsIDeviceContext* aContext,
   switch (aWidgetType) {
     case NS_THEME_BUTTON:
     {
-      aResult->SizeTo(7, 1, 7, 3);
+      if (IsButtonTypeMenu(aFrame)) {
+        *aResult = RTLAwareMargin(kAquaDropdownBorder, aFrame);
+      } else {
+        aResult->SizeTo(7, 1, 7, 3);
+      }
       break;
     }
 
diff --git a/widget/src/xpwidgets/nsNativeTheme.cpp b/widget/src/xpwidgets/nsNativeTheme.cpp
index 74b61d6d14d8..909c889ea47e 100644
--- a/widget/src/xpwidgets/nsNativeTheme.cpp
+++ b/widget/src/xpwidgets/nsNativeTheme.cpp
@@ -160,6 +160,17 @@ nsNativeTheme::GetCheckedOrSelected(nsIFrame* aFrame, PRBool aCheckSelected)
                                                  : nsWidgetAtoms::checked);
 }
 
+PRBool
+nsNativeTheme::IsButtonTypeMenu(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return PR_FALSE;
+
+  nsIContent* content = aFrame->GetContent();
+  return content->AttrValueIs(kNameSpaceID_None, nsWidgetAtoms::type,
+                              NS_LITERAL_STRING("menu"), eCaseMatters);
+}
+
 PRBool
 nsNativeTheme::GetIndeterminate(nsIFrame* aFrame)
 {
diff --git a/widget/src/xpwidgets/nsNativeTheme.h b/widget/src/xpwidgets/nsNativeTheme.h
index c8e26ff458a5..b691d36d4892 100644
--- a/widget/src/xpwidgets/nsNativeTheme.h
+++ b/widget/src/xpwidgets/nsNativeTheme.h
@@ -93,6 +93,8 @@ class nsNativeTheme
     return CheckBooleanAttr(aFrame, nsWidgetAtoms::_default);
   }
 
+  PRBool IsButtonTypeMenu(nsIFrame* aFrame);
+
   // checkbox:
   PRBool IsChecked(nsIFrame* aFrame) {
     return GetCheckedOrSelected(aFrame, PR_FALSE);