There's something wrong with the natsort() algorithm.  I sorted an array and echo'ed it out using the following code:


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$array = array("d02", "d3", "j_j", "d04", "d03");
natsort($array);

for ($i=0; $array[$i]; $i++) {
    echo "[".$i."]: ".$array[$i]."\n";
}
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Here's what it spit out:

------------
[0]: d02
[1]: d3 
[2]: j_j 
[3]: d04 
[4]: d03
------------

I'm not sure what kind of ordering it used, but it doesn't seem to follow any pattern that I know of.  =)