Hi Marc,
About the test case, https://github.com/phpmyadmin/phpmyadmin/pull/390
I think I find the reason. Refer to the link http://php.net/manual/en/reserved.variables.cookies.php
$_COOKIE (PHP 4 >= 4.1.0, PHP 5) $HTTP_COOKIE_VARS [deprecated]
So PHP 4.1.0, Introduced $_COOKIE that deprecated $HTTP_COOKIE_VARS.
I am using PHP 5.3.25 on this server.
Is errors still existed when using PHP 5.3.25? the travis build is working for PHP 5.3 5.4 5.5: https://travis-ci.org/phpmyadmin/phpmyadmin/builds/7193718 Job Duration Finished Php 2356.1 1 min 8 sec 4 days ago 5.5 2356.2 1 min 12 sec 4 days ago 5.4 2356.3 1 min 22 sec 4 days ago 5.3
Adam