diff --git a/index.html b/index.html
index 8a03607be..08f735c7a 100755
--- a/index.html
+++ b/index.html
@@ -8,9 +8,6 @@
 	<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.7.2/dojox/layout/resources/FloatingPane.css">
 	<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.7.2/dojox/layout/resources/ResizeHandle.css">
 	<link rel="stylesheet" href="css/app.css">
-	<script src="js/lib/jshashtable.js"></script>
-	<script src="js/lib/jquery-1.8.2.min.js"></script>
-	<script src="js/lib/underscore-min.js"></script>
 	<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.7.2/dojo/dojo.js" data-dojo-config="async: true, parseOnLoad: true, baseUrl: 'js/iD/'"></script>
 	<style type="text/css">
 		:focus { outline-color: transparent; outline-style: none; }
@@ -21,9 +18,7 @@
 </head>
 <body class="claro">
 <div id="appLayout" class="demoLayout">
-
   <script type="text/javascript" src="js/lib/underscore-min.js"></script>
-  <script type="text/javascript" src="js/lib/jshashtable.js"></script>
   <script type="text/javascript" src="js/lib/jquery-1.8.2.min.js"></script>
   <script type="text/javascript" src="js/iD/Util.js"></script>
   <script type="text/javascript" src="js/iD/Node.js"></script>
@@ -31,8 +26,7 @@
   <script type="text/javascript" src="js/iD/Entity.js"></script>
   <script type="text/javascript" src="js/iD/Way.js"></script>
   <script type="text/javascript" src="js/iD/Connection.js"></script>
-
-	<script>
+  <script>
 
 require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/dom",
          "dijit/form/Button","dijit/form/ToggleButton",
@@ -48,15 +42,17 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 
 	var ruleset=new iD.styleparser.RuleSet();
 	var conn=new iD.Connection("http://www.overpass-api.de/api/xapi?");
-	
+
 	// Load styles
 	ruleset.registerCallback(styleLoaded);
 	ruleset.loadFromCSS("potlatch.css",styleLoaded);
 
 	// Initialise map
 	var map = new iD.renderer.Map({
-		lat: 51.87,
-		lon: -1.49,
+		lat: 38.89,
+		lon: -77,
+		// lat: 51.87,
+		// lon: -1.49,
 		scale: 17,
 		div: "map",
 		connection: conn,
@@ -69,7 +65,7 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 	// Initialise controller
 	var controller=new iD.Controller(map);
 	map.setController(controller);
-	
+
 	// Initialise event listeners
 	on(window, "enterState", enterStateListener);
 	on(window, "exitState", exitStateListener);
@@ -90,10 +86,10 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 		// Load data
 		map.download();
 	}
-	
+
 	// ----------------------------------------------------
 	// State event listeners
-	
+
 	function enterStateListener(event) {
 		domClass.add(event.state[0]+"Button","currentMode");
 	};
@@ -101,7 +97,7 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 	function exitStateListener(event) {
 		domClass.remove(event.state[0]+"Button","currentMode");
 	};
-	
+
 	// ----------------------------------------------------
 	// Mode button handlers
 
@@ -111,7 +107,7 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 
 	enterEditMode=function() {
 	};
-	
+
 	finishClicked=function() {
 		controller.stepper.hide();
 	};
@@ -119,10 +115,10 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 	cancelClicked=function() {
 		controller.stepper.hide();
 	};
-	
+
 	// ----------------------------------------------------
 	// Map control handlers
-	
+
 	zoomInClicked =function() { map.zoomIn();  };
 	zoomOutClicked=function() { map.zoomOut(); };
 
@@ -171,7 +167,7 @@ require(["dojo/_base/lang","dojo/dom-geometry","dojo/dom-class","dojo/on","dojo/
 
 <!-- Floating help window -->
 
-<div id="helpPane" data-dojo-type="dojox.layout.FloatingPane" 
+<div id="helpPane" data-dojo-type="dojox.layout.FloatingPane"
      data-dojo-props="resizable:true, closable:false, dockable:false, title: 'Step by step'"
      style="position:absolute; top:45px; left:50px; width:200px; height:200px; visibility: hidden;" >
 	<ol id="helpSteps">
diff --git a/js/iD/controller/edit/NoSelection.js b/js/iD/controller/edit/NoSelection.js
index cbc16e325..3717d111b 100755
--- a/js/iD/controller/edit/NoSelection.js
+++ b/js/iD/controller/edit/NoSelection.js
@@ -15,28 +15,28 @@ declare("iD.controller.edit.NoSelection", [iD.controller.edit.EditBaseState], {
 	constructor:function() {
 		// summary:		In 'Edit object' mode but nothing selected.
 	},
-	
+
 	enterState:function() {
 		this.controller.stepper.hide();
 	},
-	
+
 	processMouseEvent:function(event,entityUI) {
-		this.inherited(arguments);
 		if (!entityUI) { return this; }
-		var entity=entityUI.entity;
+		var entity = entityUI.entity;
 		if (event.type=='click') {
+            this.inherited(arguments);
 			switch (entity.entityType) {
 				case 'node':
 					var ways=entity.parentWays();
-					if (ways.length==0) { return new iD.controller.edit.SelectedPOINode(entity); }
+					if (!ways.length) { return new iD.controller.edit.SelectedPOINode(entity); }
                     else { return new iD.controller.edit.SelectedWayNode(entity,ways[0]); }
+                    break;
 				case 'way':
 					return new iD.controller.edit.SelectedWay(entityUI.entity, event);
 			}
 		}
 		return this;
 	}
-	
 });
 
 // ----------------------------------------------------------------------
diff --git a/js/iD/controller/shape/DrawWay.js b/js/iD/controller/shape/DrawWay.js
index 6080b9dc7..68df1ab04 100644
--- a/js/iD/controller/shape/DrawWay.js
+++ b/js/iD/controller/shape/DrawWay.js
@@ -4,7 +4,7 @@
 	Add road or shape -> DrawWay
 
 	The user is drawing a way.
-	
+
 	Goes to:
 	-> click empty area: adds point, continues
 	-> click way: adds junction, continues
@@ -26,8 +26,8 @@ declare("iD.controller.shape.DrawWay", [iD.controller.ControllerState], {
 	wayUI: null,
 	editEnd: false,
 
-	constructor:function(_way) {
-		this.way=_way;
+	constructor: function(way) {
+		this.way = way;
 	},
 	enterState:function() {
 		this.wayUI=this.controller.map.getUI(this.way);
@@ -42,14 +42,14 @@ declare("iD.controller.shape.DrawWay", [iD.controller.ControllerState], {
 		this.wayUI.resetStateClass('shownodes');
 		this.wayUI.redraw();
 	},
-	
+
 	processMouseEvent:function(event,entityUI) {
 		var entity=entityUI ? entityUI.entity : null;
 		var entityType=entity ? entity.entityType : null;
 		var map=this.controller.map;
         var ways;
 
-		if (event.type=='mouseover' && entityType=='way' && entityUI!=this.wayUI) { 
+		if (event.type=='mouseover' && entityType=='way' && entityUI!=this.wayUI) {
 			// Mouse over way, show hover highlight
 			entityUI.setStateClass('shownodeshover');
 			entityUI.redraw();
@@ -57,7 +57,7 @@ declare("iD.controller.shape.DrawWay", [iD.controller.ControllerState], {
 			this.updateElastic(event);
 			return this;
 
-		} else if (event.type=='mouseout' && entityType=='way' && entityUI!=this.wayUI) { 
+		} else if (event.type=='mouseout' && entityType=='way' && entityUI!=this.wayUI) {
 			// Mouse left way, remove hover highlight
 			// Find what object we're moving into
 			var into=shape.byId((event.hasOwnProperty('toElement') ? event.toElement : event.relatedTarget).__gfxObject__);
@@ -117,7 +117,7 @@ declare("iD.controller.shape.DrawWay", [iD.controller.ControllerState], {
 					var action=this.undoAdder(); action(undo);
 					return this;
 			}
-		
+
 		} else if (event.type=='click') {
 			// Click on empty space, add new node to way
 			var undo=new iD.actions.CompositeUndoableAction();
@@ -137,15 +137,15 @@ declare("iD.controller.shape.DrawWay", [iD.controller.ControllerState], {
 			map.mouseX(event), map.mouseY(event)
 		);
 	},
-	
+
 	getDrawingNode:function() {
 		return (this.editEnd ? this.way.nodes[this.way.length()-1] : this.way.nodes[0]);
 	},
-	
+
 	getStartNode:function() {
 		return (this.editEnd ? this.way.nodes[0] : this.way.nodes[this.way.length()-1]);
 	},
-	
+
 	appendNode:function(node, performAction) {
         if (this.editEnd) { this.way.doAppendNode(node, performAction); }
         else { this.way.doPrependNode(node, performAction); }
@@ -154,13 +154,13 @@ declare("iD.controller.shape.DrawWay", [iD.controller.ControllerState], {
 	appendNewNode:function(event, undo) {
 		var map=this.controller.map;
 		var node=this.getConnection().doCreateNode(
-			{}, 
+			{},
 			map.coord2lat(map.mouseY(event)),
 			map.coord2lon(map.mouseX(event)), lang.hitch(undo,undo.push) );
 		this.appendNode(node, lang.hitch(undo,undo.push));
 		return node;
 	}
-	
+
 });
 
 // ----------------------------------------------------------------------
diff --git a/js/iD/controller/shape/NoSelection.js b/js/iD/controller/shape/NoSelection.js
index 021265196..d866d23f8 100644
--- a/js/iD/controller/shape/NoSelection.js
+++ b/js/iD/controller/shape/NoSelection.js
@@ -4,7 +4,7 @@
 	Add road or shape -> NoSelection
 
 	The user has clicked 'Add road or shape', but hasn't yet started drawing.
-	
+
 	Goes to:
 	-> click empty area: goes to shape/DrawWay
 	-> click way: goes to shape/SelectedWay
@@ -37,7 +37,7 @@ declare("iD.controller.shape.NoSelection", [iD.controller.ControllerState], {
 			tag: "Set the type of the road or shape"
 		},['begin','draw','tag']).highlight('begin');
 	},
-	
+
 	processMouseEvent:function(event,entityUI) {
 		var entity=entityUI ? entityUI.entity : null;
 		var entityType=entity ? entity.entityType : null;
@@ -70,7 +70,6 @@ declare("iD.controller.shape.NoSelection", [iD.controller.ControllerState], {
 		}
 		return this;
 	}
-	
 });
 
 // ----------------------------------------------------------------------
diff --git a/js/iD/renderer/EntityUI.js b/js/iD/renderer/EntityUI.js
index 48e62a890..0d6a9ea1b 100755
--- a/js/iD/renderer/EntityUI.js
+++ b/js/iD/renderer/EntityUI.js
@@ -56,7 +56,7 @@ declare("iD.renderer.EntityUI", null, {
 		this.layer=this.styleList.layerOverride();
 		if (isNaN(this.layer)) {
 			this.layer=0;
-			if (tags['layer']) { this.layer=Number(tags['layer']); }
+			if (tags.layer) { this.layer = +tags.layer; }
 		}
 
 		// Iterate through each subpart, drawing any styles on that layer
@@ -78,7 +78,7 @@ declare("iD.renderer.EntityUI", null, {
 
 	// --------------------
 	// State class handling
-	
+
 	setStateClasses:function(stateClasses) {
 		// summary:		Set all state classes at once, and prompt a redraw if they're different to previously,
 		if (stateClasses && this.stateClasses.join(',')!=stateClasses.join(',')) {
@@ -87,7 +87,7 @@ declare("iD.renderer.EntityUI", null, {
 		}
 		return this;
 	},
-	
+
 	setStateClass:function(sc) {
 		// summary:		Set a single state class, and prompt a redraw if it wasn't set previously.
 		if (this.stateClasses.indexOf(sc)==-1) {
diff --git a/js/iD/renderer/Map.js b/js/iD/renderer/Map.js
index af02e9c94..b083a2372 100755
--- a/js/iD/renderer/Map.js
+++ b/js/iD/renderer/Map.js
@@ -75,7 +75,12 @@ declare("iD.renderer.Map", null, {
 		this.wayuis={},
 		this.div=document.getElementById(obj.div);
 		this.surface=Gfx.createSurface(obj.div, this.mapwidth, this.mapheight);
-		this.backdrop=this.surface.createRect( { x:0, y:0, width: this.mapwidth, height: this.mapheight }).setFill(new dojo.Color([255,255,245,1]));
+		this.backdrop=this.surface.createRect({
+            x: 0,
+            y: 0,
+            width: this.mapwidth,
+            height: this.mapheight
+        }).setFill(new dojo.Color([255,255,245,1]));
 		this.tilegroup=this.surface.createGroup();
 		this.container=this.surface.createGroup();
 		this.conn=obj.connection;
@@ -341,16 +346,16 @@ declare("iD.renderer.Map", null, {
 
 	_getTile:function(z,x,y) {
 		// summary:		See if this tile is already loaded.
-		if (this.tiles[z]===undefined) { return undefined; }
-		if (this.tiles[z][x]===undefined) { return undefined; }
-		return this.tiles[z][x][y];
+        var k = z + ',' + x + ',' + y;
+		return this.tiles[k];
 	},
 
 	_assignTile:function(z,x,y,t) {
 		// summary:		Store a reference to the tile so we know it's loaded.
-		if (this.tiles[z]===undefined) { this.tiles[z]=[]; }
-		if (this.tiles[z][x]===undefined) { this.tiles[z][x]=[]; }
-		this.tiles[z][x][y]=t;
+        var k = z + ',' + x + ',' + y;
+        if (!this.tiles[k]) {
+            this.tiles[z + ',' + x + ',' + y] = t;
+        }
 	},
 
 	_tileURL:function(z,x,y) {
@@ -359,8 +364,8 @@ declare("iD.renderer.Map", null, {
 		for (var zoom=z; zoom>0; zoom--) {
 			var byte=0;
 			var mask=1<<(zoom-1);
-			if ((x & mask)!=0) byte++;
-			if ((y & mask)!=0) byte+=2;
+			if ((x & mask) !== 0) byte++;
+			if ((y & mask) !== 0) byte += 2;
 			u=u+byte.toString();
 		}
 		return this.tilebaseURL.replace('$z',z).replace('$x',x).replace('$y',y).replace('$quadkey',u);
@@ -369,7 +374,7 @@ declare("iD.renderer.Map", null, {
 	_blankTiles:function() {
 		// summary:		Unload all tiles and remove from the display.
 		this.tilegroup.clear();
-		this.tiles=[];
+		this.tiles = {};
 	},
 
 	// -------------------------------------------
@@ -426,12 +431,12 @@ declare("iD.renderer.Map", null, {
 	},
 
 	_mouseEvent:function(e) {
-		// summary: Catch mouse events on the surface but not the tiles - in other words,
-		// 	on drawn items that don't have their own hitzones, like the fill of a shape.
-		if (e.type=='mousedown') { this.startDrag(e); }
-		// ** FIXME: we may want to reinstate this at some point...
-		// this.controller.entityMouseEvent(e,null);
-	},
+        // summary: Catch mouse events on the surface but not the tiles - in other words,
+        // on drawn items that don't have their own hitzones, like the fill of a shape.
+        if (e.type=='mousedown') { this.startDrag(e); }
+        // ** FIXME: we may want to reinstate this at some point...
+        // this.controller.entityMouseEvent(e,null);
+    },
 
 	updateCoordsFromViewportPosition:function(e) {
 		// summary:		Update centre and bbox from the current viewport origin.
@@ -439,10 +444,10 @@ declare("iD.renderer.Map", null, {
 	},
 
 	updateCoordsFromLatLon:function(lat,lon) {
-		// summary:		Update centre and bbox to a specified lat/lon.
-		this._updateCoords(-(this.lon2coord(lon)-this.mapwidth/2),
-		                   -(this.lat2coord(lat)-this.mapheight/2));
-	},
+        // summary:		Update centre and bbox to a specified lat/lon.
+        this._updateCoords(-(this.lon2coord(lon)-this.mapwidth/2),
+                           -(this.lat2coord(lat)-this.mapheight/2));
+    },
 
 	_updateCoords:function(x,y) {
 		// summary:		Set centre and bbox.
diff --git a/js/iD/renderer/NodeUI.js b/js/iD/renderer/NodeUI.js
index 01a990e92..eefd147d8 100755
--- a/js/iD/renderer/NodeUI.js
+++ b/js/iD/renderer/NodeUI.js
@@ -1,7 +1,7 @@
 // iD/renderer/NodeUI.js
 // NodeUI classes for iD
 
-define(['dojo/_base/declare','dojo/_base/lang','dojo/_base/array','dojox/gfx/_base','iD/renderer/EntityUI'], 
+define(['dojo/_base/declare','dojo/_base/lang','dojo/_base/array','dojox/gfx/_base','iD/renderer/EntityUI'],
        function(declare,lang,array,g){
 
 // ----------------------------------------------------------------------
@@ -63,7 +63,7 @@ declare("iD.renderer.NodeUI", [iD.renderer.EntityUI], {
 			}
 			hit.setFill([0,1,0,0]).setStroke( { width:2, color:[0,0,0,0] } );
 			this.recordSprite(hit);
-			hit.source=this;
+			hit.source= this;
 			hit.connect("onclick"     , lang.hitch(this,this.entityMouseEvent));
 			hit.connect("onmousedown" , lang.hitch(this,this.entityMouseEvent));
 			hit.connect("onmouseup"   , lang.hitch(this,this.entityMouseEvent));
@@ -71,7 +71,6 @@ declare("iD.renderer.NodeUI", [iD.renderer.EntityUI], {
 			hit.connect("onmouseleave", lang.hitch(this,this.entityMouseEvent));
 		}
 	}
-	
 });
 
 
diff --git a/potlatch.css b/potlatch.css
index afeccac8c..ff0e86d1f 100755
--- a/potlatch.css
+++ b/potlatch.css
@@ -6,7 +6,6 @@
 	Based heavily on:
 	MapCSS demonstration stylesheet
 	Richard Fairhurst, October 2009
-	
 */
 
 /* A set of fairly standard rules.
@@ -20,13 +19,13 @@ way[highway=primary],way[highway=primary_link],
 way[highway=secondary],way[highway=secondary_link],
 way[highway=tertiary],way[highway=tertiary_link],
 way[highway=unclassified],
-way[highway=residential]                             { text: name; text-color: black; font-size: 6; text-position: line;}
+way[highway=residential]                            { text: name; text-color: black; font-size: 6; text-position: line;}
 way[highway=motorway],way[highway=motorway_link]    { z-index: 9; color: #809BC0; width: 7; casing-color: black; casing-width: 1; }
 way[highway=trunk],way[highway=trunk_link]          { z-index: 9; color: #7FC97F; width: 7; casing-color: black; casing-width: 1; }
-way[highway=primary],way[highway=primary_link]      { z-index: 8; color: #E46D71; width: 7; casing-color: black; casing-width: 1; }
+way[highway=primary],way[highway=primary_link]      { z-index: 8; color: #E46D71; width: 9; casing-color: black; casing-width: 1; }
 way[highway=secondary],way[highway=secondary_link]  { z-index: 7; color: #FDBF6F; width: 7; casing-width: 1; }
 way[highway=tertiary],way[highway=unclassified]     { z-index: 6; color: #FEFECB; width: 5; casing-width: 1; }
-way[highway=residential]                            { z-index: 5; color: #E8E8E8; width: 5; casing-color: gray; casing-width: 1; }
+way[highway=residential]                            { z-index: 5; color: #E8E8E8; width: 6; casing-color: gray; casing-width: 1; }
 way[highway=service]                                { color: white; width: 3; casing-width: 1; }
 
 /* Pedestrian precincts need to be treated carefully. Only closed-loops with an explicit
