When I put Location CCK map view (display address and map using GMap) in CCK fieldgroup and display this fieldgroup as a tab using this CCK Fieldgoup Tabs, the map view does not centre properly the marker. It slides one width off the screen to the west. When I change display mode of the fieldgroup with map ti the mode different than tabs (simple, or filedgroup, or other) Gmap goes back to displaying the location marker properly centred

As I am not very good in debugging Javascript anybody knows what function could cause this problem?