When access to Overview screen with View Data mode,
The mapping value (eg: Host status: Up (0)) is incorrect, it always get the string of previous host.
I debugged in the web source code and find the problem in function replace_value_by_map (at /php/include/config.inc.php)
It should be fixed as following:
function replace_value_by_map($value, $valuemapid){
if($valuemapid < 1) return $value;

static $valuemaps = array();
if(isset($valuemaps[$valuemapid][$value])) return $valuemaps[$valuemapid][$value];

$sql = 'SELECT newvalue '.
' FROM mappings '.
' WHERE valuemapid='.$valuemapid.
' AND value='.zbx_dbstr($value);
$result = DBselect($sql);
if($row = DBfetch($result))

{ $valuemaps[$valuemapid][$value] = $row['newvalue'].' '.'('.$value.')'; return $valuemaps[$valuemapid][$value]; }

return $value;
}