WordPress MU

Found alittle truble in gt_searh_all_blog:
when result not found script gives error at lines 120 and 121:
rsort($search);
reset($search);
(function can't be done).
For correct it, remove that lines at the end of if($thispost) it well be lines 117 and 118 before
}
}
}

hello
i have a problem with this and the new version of wpmu

in all the case i have error like this

Cannot modify header information - headers already sent by (output started at /homez.56/annoncesne/www/wp-content/mu-plugins/gt_search_all_blogs.php:1) in /homez.56/annoncesne/www/wp-includes/pluggable.php on line 776

it seems to be a problem of output

You have whitespace at the end of your file.