[OpenLayers-Users] wms tiles off in latitude for spherical mercator setup

[thomcat]

My WMS tiles service works fine on a v2 google site but on openlayers the
same WMS service the tiles show up offset by a tile or so directly to the
south...so I suspect my map setup to match mercator.

I have added and removed the displayprojection below with no change..and
goofed around with the layer set up and using the alias back to
3857...nothing changes the bad location of my WMS tiles tho. I checked my
bbox on the wms call as well and it looks OK.

Any ideas of what to check...the allOverlays didn't seem to matter as
well..I want to use that eventually for now I draw the google and or
openstreet to make sure I know where I am even with white background

Here is my map definition:

     map = new OpenLayers.Map({
                 div: "map",
                 allOverlays: true,              
                 projection: new OpenLayers.Projection("EPSG:900913"),
               displayProjection: new OpenLayers.Projection("EPSG:4326"),
                 units: "m",
                 numZoomLevels: 18,
                 maxResolution: "auto",   // maxResolution: 156543.0339,
                 maxExtent: new OpenLayers.Bounds(-20037508.34,
-20037508.34, 20037508.34, 20037508.34) 
             });


 OpenLayers.Projection.addTransform("EPSG:4326", "EPSG:3857",
OpenLayers.Layer.SphericalMercator.projectForward);
             OpenLayers.Projection.addTransform("EPSG:3857", "EPSG:4326",
OpenLayers.Layer.SphericalMercator.projectInverse);

             // create sphericalmercator layers
             var googleLayer = new OpenLayers.Layer.Google("Google", {
"sphericalMercator": true });
             var osmLayer = new OpenLayers.Layer.OSM("OpenStreetMap");

             // override default epsg code
             aliasproj = new OpenLayers.Projection("EPSG:3857");
             googleLayer.projection = osmLayer.projection = aliasproj;


             //add baselayers to map
             map.addLayers([googleLayer, osmLayer]);


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