problem solved:
append to beggining of simpleviewer.php (located in nextgen-flashviewer/xml) this code:
ini_set('display_errors', FALSE);
xml generator work now correctly without deprecated warnings!
i have the same problem 🙁
it looks like it will not generate xml content.. may be collision with new wordpress version?
in wp-google-weather.php find getData() function,
than edit $xmlUrl:
$xmlUrl = 'http://www.google.com/ig/api?weather='.$city.'&hl='.$lang.'&ie=utf-8&oe=utf-8';
last two atribs tells google wich encoding sould to use
it works for me
PS: dl link for modified plugin wp_google_weather_modified and working preview