requires, includes, path strangeness

[Anon]

I'm installing phpMyadmin 2.2.1 on a cgi php_4.0.6 linux box and am having trouble with includes (aka requires?).

Called a require like this doesn't work -
require('./libraries/grab_globals.lib.php');
require('./libraries/common.lib.php');

Yet calling it like this does -
require('libraries/grab_globals.lib.php');
require('libraries/common.lib.php');

I've tried adding everything imaginable to the include path via php.ini, but with no luck. Does the solution lie somewhere in the environment variables? Or has anyone run into this before? I saw a few mentions, but nothing specific enough to apply to me.

Thanks all!