version of MySQL is 4.0.18.

not MYSQL bug, serendipity's bug.

one solution is LIKE,but it is a lot slower ;

other solution use MATCH,maybe here:
http://www.evolt.org/article/Boolean_Fu ... index.html

serendipity0.6p11 not support multi-byte language's search,such as Chinese search.

i changed function serendipity_searchEntries in serendipity_functions.inc.php to fix it.
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function serendipity_searchEntries($term) {
global $serendipity;

$querystring ...