diff -r 3a521e980fbf -r 4a9146ccc9f4 indra/newview/llviewermenu.cpp
--- a/indra/newview/llviewermenu.cpp	Wed Dec 21 15:21:12 2011 -0500
+++ b/indra/newview/llviewermenu.cpp	Thu Jan 12 15:42:31 2012 -0500
@@ -2762,8 +2762,31 @@
 	else
 	{
 		// Just a regular object
-		return LLSelectMgr::getInstance()->getSelection()->
-			contains( object, SELECT_ALL_TES );
+		return LLSelectMgr::getInstance()->getSelection()->contains( object, SELECT_ALL_TES ) &&
+			   !LLMuteList::getInstance()->isMuted(object->getID());
+	}
+}
+
+bool enable_object_unmute()
+{
+	LLViewerObject* object = LLSelectMgr::getInstance()->getSelection()->getPrimaryObject();
+	if (!object) return false;
+
+	LLVOAvatar* avatar = find_avatar_from_object(object); 
+	if (avatar)
+	{
+		// It's an avatar
+		LLNameValue *lastname = avatar->getNVPair("LastName");
+		bool is_linden =
+			lastname && !LLStringUtil::compareStrings(lastname->getString(), "Linden");
+		bool is_self = avatar->isSelf();
+		return !is_linden && !is_self;
+	}
+	else
+	{
+		// Just a regular object
+		return LLSelectMgr::getInstance()->getSelection()->contains( object, SELECT_ALL_TES ) &&
+			   LLMuteList::getInstance()->isMuted(object->getID());;
 	}
 }
 
@@ -8281,6 +8304,7 @@
 
 	enable.add("Avatar.EnableMute", boost::bind(&enable_object_mute));
 	enable.add("Object.EnableMute", boost::bind(&enable_object_mute));
+	enable.add("Object.EnableUnmute", boost::bind(&enable_object_unmute));
 	enable.add("Object.EnableBuy", boost::bind(&enable_buy_object));
 	commit.add("Object.ZoomIn", boost::bind(&handle_look_at_selection, "zoom"));
 
diff -r 3a521e980fbf -r 4a9146ccc9f4 indra/newview/skins/default/xui/en/menu_inspect_object_gear.xml
--- a/indra/newview/skins/default/xui/en/menu_inspect_object_gear.xml	Wed Dec 21 15:21:12 2011 -0500
+++ b/indra/newview/skins/default/xui/en/menu_inspect_object_gear.xml	Thu Jan 12 15:42:31 2012 -0500
@@ -114,6 +114,15 @@
      function="Object.EnableMute" />
   </menu_item_call>
   <menu_item_call
+   label="Unblock"
+   layout="topleft"
+   name="unblock">
+    <menu_item_call.on_click
+     function="Object.Mute" />
+    <menu_item_call.on_visible
+     function="Object.EnableUnmute" />
+  </menu_item_call>
+  <menu_item_call
     label="Zoom In"
     layout="topleft"
    name="zoom_in">