Description:
------------
executing the following code using direct php (with mysqli) or using phpmyadmin using the mysqli extension returns 2 affected rows. running it with php or phpmyadmin using mysql extension, returns 0 affected rows (which is correct!).

using mysql 5.0.41 server and 5.0.38 client libraries.

Reproduce code:
---------------
CREATE TABLE `user_infos` (
  `user_id` int(10) unsigned NOT NULL,
  `mails` tinyint(4) NOT NULL,
  `mails_trigger` enum('0','1') collate latin1_german1_ci NOT NULL,
  `book` enum('0','1') collate latin1_german1_ci NOT NULL,
  `gtag` tinyint(4) NOT NULL,
  `foto_comment` enum('0','1') collate latin1_german1_ci NOT NULL,
  `buchung` enum('0','1') collate latin1_german1_ci NOT NULL,
  `blog_comment` enum('0','1') collate latin1_german1_ci NOT NULL,
  `i_mail` tinyint(4) NOT NULL,
  `i_buddy` tinyint(4) NOT NULL,
  `i_tele` tinyint(3) unsigned NOT NULL,
  `i_lchat` tinyint(3) unsigned NOT NULL,
  `i_close` enum('0','1') collate latin1_german1_ci NOT NULL,
  `max_fotoalben` tinyint(3) unsigned NOT NULL,
  `max_fotoalben_fotos` int(10) unsigned NOT NULL,
  `events` enum('0','1') collate latin1_german1_ci NOT NULL,
  `contacts_look` enum('text','images') collate latin1_german1_ci NOT
NULL default 'images',
  PRIMARY KEY  (`user_id`),
  KEY `trigger_mails` (`mails_trigger`,`mails`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_german1_ci;

INSERT IGNORE INTO user_infos SET
user_id=1,mails=1,book='1',gtag=1,foto_comment='0',blog_comment='1',buchung='1',i_mail=4,i_buddy=11,i_tele=5,i_lchat=10,i_close='0',events='1';


Expected result:
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affected_rows = 1 (first insert)
0 in the following inserts



Actual result:
--------------
always 2