To be a little more helpful, using the debug tool I get the following:
Errors, Warnings, Notices
Notice: Undefined offset: 1 in /home/content/25/4494725/html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2423
Notice: Undefined offset: 2 in /home/content/25/4494725/html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2424
Notice: Undefined offset: 1 in /home/content/25/4494725/html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2424
Notice: Undefined offset: 2 in /home/content/25/4494725/html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2425
Notice: Undefined offset: 1 in /home/content/25/4494725/html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2425
Warning: mktime() expects parameter 1 to be long, string given in /home/content/25/4494725/html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2426
Referring to these lines:
function GetTimestampFromMySql($mysqlDateTime) {
list($date, $hours) = split(' ', $mysqlDateTime);
list($year,$month,$day) = split('-',$date);
list($hour,$min,$sec) = split(':',$hours);
return mktime($hour, $min, $sec, $month, $day, $year);
}