I changed to:
layer.destroyFeatures();
layer.addFeatures((new
OpenLayers.Format.GeoJSON()).read(req.responseText));
setTimeout(function() { layer.redraw(); }, 100);
With the same results =(... any other trick... i search but i cannot
found any topic about this bug =/...
IE and his "only god knows features" =( ...
Cheers !!
Felipe