map displacement and empty areas when changing layers

Maps in different layers, can produce different extends and strange behavior when changing from one layer to an other.

Sometimes maps are getting corrupted and only one part of the images appears inside the mapping openlayers object area.
In general there is a specific displacement on Google-physical and some yahoo-maps problems between layers. Google physical then still has the displacement after changing between layers, and if there are restricted extends values you cannot plot back to the original location. Sometimes empty areas appear in maps. See the images attached. Screenshots based on "Demo baselayers" auto configured map. Other code embeded maps "[map baselayers="google-physical|opacity.......]" produce the same (not allways) behaviour.
Sometimes a half filled layer (e.g "yahoo") after a period of time gets a full map and then... choosing... the first layer.. (e.g "google") this one gets the empty areas!