Missing GoogleMaps tiles on display

[openlayers]

Hi,

I'm trying to use OpenLayers for the first time and have a serious problem. I've creating a map containing four GoogleMaps layers and a markers layer. And :

• when the map is displayed for the first time, some tiles are missing (Cf first screenshot) ; I have to zoom or translate the map to make them display correctly
• if I switch to another layer after moving/zooming the first one, some tiles (on right and/or bottom of the map) are always missing (Cf second screenshot)
• if I switch to another layer **before** moving/zooming the first one, tiles are always missing and layers seems to be "unsynchronized" (not the same zoom level and not centered on the same point)
• tracking a few activity with Firebug shows that some tiles are loaded, but it's those which are located to the upper-left sides of the map, which are (normally !) unseen...

You'll find my source code in the "source.txt" file ("location_map" is an HTML div, defined of 540x400 pixels in CSS).

Thanks for any help, Thierry

[openlayers]

Problem solved : the problem was that the matching DIV was hidden when the map was initialized. Hiding the DIV after map initialization solves the problem.