[imp] timezone setting

[Liam Hoekenga]

I've got this stanza in my prefs.php:

$_prefs['timezone'] = array(
    'value' => 'America/Detroit',
    'locked' => true,
    'shared' => true,
    'type' => 'select',
    'desc' => _("Your current time zone:")
);

Yet, all of my mail is coming from the +0100 timezone instead of the -0400 timezone.

"America/Detroit" is a valid setting in horde/config/lang.php. Where does that
correspond w/something "real"?  (How does Horde know that "America/Detroit" is
supposed to be -0400)?

If I do a "date" command from my command line, it shows us being in the right zone:

Tue Oct 22 13:24:13 EDT 2002

Liam