diff --git a/lib/OpenLayers/Layer/HTTPRequest.js b/lib/OpenLayers/Layer/HTTPRequest.js
index 50bd287175..70a9c84efb 100644
--- a/lib/OpenLayers/Layer/HTTPRequest.js
+++ b/lib/OpenLayers/Layer/HTTPRequest.js
@@ -35,10 +35,13 @@ OpenLayers.Layer.HTTPRequest = OpenLayers.Class(OpenLayers.Layer, {
     
     /** 
      * APIProperty: reproject
+     * *Deprecated*. See http://trac.openlayers.org/wiki/SpatialMercator
+     * for information on the replacement for this functionality. 
      * {Boolean} Whether layer should reproject itself based on base layer 
      *           locations. This allows reprojection onto commercial layers. 
      *           Default is false: Most layers can't reproject, but layers 
-     *           which can create non-square geographic pixels can, like WMS. 
+     *           which can create non-square geographic pixels can, like WMS.
+     *           
      */
     reproject: false,
 
diff --git a/lib/OpenLayers/Layer/TMS.js b/lib/OpenLayers/Layer/TMS.js
index 6a73f89e2e..4d87528c20 100644
--- a/lib/OpenLayers/Layer/TMS.js
+++ b/lib/OpenLayers/Layer/TMS.js
@@ -13,12 +13,6 @@
  */
 OpenLayers.Layer.TMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
 
-    /**
-     * APIProperty: reproject
-     * {Boolean}
-     */
-    reproject: false,
-
     /**
      * APIProperty: isBaseLayer
      * {Boolean}
diff --git a/lib/OpenLayers/Layer/TileCache.js b/lib/OpenLayers/Layer/TileCache.js
index 8e29c8699d..f5ca846b1d 100644
--- a/lib/OpenLayers/Layer/TileCache.js
+++ b/lib/OpenLayers/Layer/TileCache.js
@@ -16,13 +16,6 @@
  */
 OpenLayers.Layer.TileCache = OpenLayers.Class(OpenLayers.Layer.Grid, {
 
-    /** 
-     * APIProperty: reproject
-     * {Boolean} Try to reproject this layer if it is used as an overlay.
-     *     Default is false.
-     */
-    reproject: false,
-    
     /** 
      * APIProperty: isBaseLayer
      * {Boolean} Treat this layer as a base layer.  Default is true.
diff --git a/lib/OpenLayers/Layer/WMS.js b/lib/OpenLayers/Layer/WMS.js
index aaea0dca0e..518ab68284 100644
--- a/lib/OpenLayers/Layer/WMS.js
+++ b/lib/OpenLayers/Layer/WMS.js
@@ -31,12 +31,14 @@ OpenLayers.Layer.WMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
     
     /**
      * Property: reproject
+     * *Deprecated*. See http://trac.openlayers.org/wiki/SpatialMercator
+     * for information on the replacement for this functionality. 
      * {Boolean} Try to reproject this layer if its coordinate reference system
      *           is different than that of the base layer.  Default is true.  
      *           Set this in the layer options.  Should be set to false in 
      *           most cases.
      */
-    reproject: true,
+    reproject: false,
  
     /**
      * APIProperty: isBaseLayer
diff --git a/lib/OpenLayers/Tile.js b/lib/OpenLayers/Tile.js
index 280953baab..fef62dcefb 100644
--- a/lib/OpenLayers/Tile.js
+++ b/lib/OpenLayers/Tile.js
@@ -205,6 +205,12 @@ OpenLayers.Tile = OpenLayers.Class({
      * bounds - {<OpenLayers.Bounds>} 
      */
     getBoundsFromBaseLayer: function(position) {
+        OpenLayers.Console.warn("You are using the 'reproject' option " +
+          "on the " + this.layer.name + " layer. This option is deprecated: " +
+          "its use was designed to support displaying data over commercial " + 
+          "basemaps, but that functionality should now be achieved by using " +
+          "Spherical Mercator support. More information is available from " +
+          "http://trac.openlayers.org/wiki/SphericalMercator."); 
         var topLeft = this.layer.map.getLonLatFromLayerPx(position); 
         var bottomRightPx = position.clone();
         bottomRightPx.x += this.size.w;
diff --git a/tests/Layer/test_WMS.html b/tests/Layer/test_WMS.html
index 31f561758f..d52a4f483b 100644
--- a/tests/Layer/test_WMS.html
+++ b/tests/Layer/test_WMS.html
@@ -282,7 +282,7 @@
             var layer = new OpenLayers.Layer.Google("Google");
             map.addLayer(layer);
             var wmslayer = new OpenLayers.Layer.WMS(name, url, params,
-                                                    {isBaseLayer: false});
+                                                    {isBaseLayer: false, reproject:true});
             wmslayer.isBaseLayer=false;
             map.addLayer(wmslayer);
             map.setCenter(new OpenLayers.LonLat(0,0), 5);
diff --git a/tests/Tile/test_Image.html b/tests/Tile/test_Image.html
index de264e7d2d..17bed356b0 100644
--- a/tests/Tile/test_Image.html
+++ b/tests/Tile/test_Image.html
@@ -168,7 +168,7 @@
         var size = new OpenLayers.Size(5,6);
         var map = new OpenLayers.Map('map');
         var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS", 
-            "http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'}); 
+            "http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'}, {'reproject': true}); 
         map.addLayer(layer);
         map.zoomToMaxExtent();
         tile = new OpenLayers.Tile.Image(layer, position, new OpenLayers.Bounds(-90,-85,-90,85), url, size);
@@ -176,7 +176,7 @@
         tile.moveTo(new OpenLayers.Bounds(-185,-90,-180,-80), new OpenLayers.Pixel(-180,-85), true);
         t.delay_call( 1, function() { t.eq(tile.imgDiv, null, "Tile imgDiv is null.") } );
         var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS", 
-            "http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'}, {'alpha':true});
+            "http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'}, {'reproject': true, 'alpha':true});
         map.addLayer(layer);
         tile = new OpenLayers.Tile.Image(layer, position, new OpenLayers.Bounds(-90,-85,-90,85), url, size);
         tile.draw();