number "0" in message compose text box

[boiboi@stberlin.com]

0<--- this zero shows up everytime I launch message composition. In pref this 
is what i have:

/ user preferred email address for From: line
// see also $conf['hooks']['from'] in conf.php
$_prefs['from_addr'] = array(
    'value' => '',
    'locked' => false,
    'shared' => true,
    'type' => 'implicit'

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