[OpenLayers-Users] Problem with GeoRSS layer

[nick@hogweed.org]

Regarding my OpenStreetMap/OpenLayers test, now that a GeoRSS layer is 
available I have tried making my annotations available as (what I believe is) 
GeoRSS, e.g.

http://nick.dev.openstreetmap.org/openlayers/markers.php?bbox=-1,51,0,52

However when I try and create a GeoRSS layer:

    var georssLayer = new OpenLayers.Layer.GeoRSS('annotations',
            'http://nick.dev.openstreetmap.org/openlayers/markers.php');
    map.addLayer(georssLayer);

I get this message as an alert box:

Unhandled request return Not Found

That would indicate that the URL I supplied gives a 404 error.... which is not 
the case. Furthermore if I try entering the URL in the GeoRSS example, I get 
a Bad Request error.

Any ideas here? The full source is available at 
http://nick.dev.openstreetmap.org/openlayers/main.js.

Thanks,
Nick