The script below produces a lot of output on two of 
our systems. One a 6 cpu ppro, the other a single
cpu duron 950. Both boxes run redhat 7.3. One runs the
php that came with redhat 7.3, the 6 cpu box runs php
4.2.2 that we compiled ourselves to add more options.

For sample output of this script, with a phpinfo() call
appended to it, go to:

http://www.umci.com/testcode.phtml


<?
$start=0.01;
while ($start <= 10) {
// Removing the quotes from test's assignment will eliminate the 
// errors unless you uncomment the ++/-- down a fiew lines.
$test="$start";
$test2=$start;

/////////////////////////////////////////////////////////////////
// Uncommenting these two lines accentuates the problem a bit...
/////////////////////////////////////////////////////////////////
//$test++;
//$test--;

if ($test!=$test2)
echo "Comparison Result: \"$test\" != \"$test2\" ----- Shouldn't this be true?<br>";
$start = $start + 0.01;
} 

?>