How reproducible? = Everytime.

Development System used:
Use the following code in updated 6.7.1 on Ubuntu 9.04 (2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 22:12:12 UTC 2009
x86_64 GNU/Linux)

Web Server Used:
LAMP - Fedora Core 8 (Updated) with xdebug

Step 1:
Place the following code in a PHP file on script.
<?php
$newArray[] =
    array(
    _01=> "2",
    _02=> "2",
    _03=> "2",
    _04=> "2",
    _05=> "2",
    _06=> "2",
    _07=> "2",
    _08=> "2",
    _09=> "2",
    _10=> "2",
    _11=> "2",
    _12=> "2",
    _13=> "2",
    _14=> "2",
    _15=> "2",
    _16=> "2",
    _17=> "2",
    _18=> "2",
    _19=> "2",
    _20=> "2",
    _21=> "2",
    _22=> "2",
    _23=> "2",
    _24=> "2",
    _25=> "2",
    _26=> "2",
    _27=> "2",
    _28=> "2",
    _29=> "2",
    _30=> "2",
    _31=> "2",
    _32 => "2");
$newArray[0]['dist'] = '55';
print_r($newArray);
?>

Step 2:
Start the stepping debugger or put a breakpoint anywhere in the script.

The last two items of the multi-dimensional array (E.G.; _32 => "2" AND 'dist' => 55) will never show up in the
Variables window nor the Watch Window.

Note; placed "print_r($newArray);" at the end to prove that the array did in fact contain the two items that do not show
up in the debug variables window.