works just fine for me. my test code:

<?php
$ts = mktime(12,0,0,1,29,2002);
$jd = unixtojd($ts);
echo jddayofweek($jd); # outputs '2'

as it turns out, the reporter was using juliantojd() to convert a gregorian date.

(this note for the benefit of anyone searching the bug database because they make the same mistake.)

$jd = unixtojd(); //unix sec since 1970 to julian day
$day = JDDayOfWeek($jd); //displays day of week, sunday = 0 - sat = 6

echo $day; // Keeps giving me 4 and today is wednesday...???