Memory usage on system after restarting apache goes down to 50% usage after refreshing 100 times memory usage goes to 83% and errors start happening.

Upgraded to PHP Version 5.1.0RC5-dev

Warning: imagepstext() [function.imagepstext]: T1Lib Error: Font ID Invalid in this Context in /usr/home/GuestBook/randomImage.php on line 35

Line 35
imagepstext($im, $rand, $font, 32, $text_color, $black, 12, 28);

Same problem after refreshing the script for about 20mins the above error message would come up quite frequently.

One more thing: Are you using Apache2? And if so, which MPM?

Not using apache2

Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc.

If possible, make the script source available online and provide
an URL to it here. Try to avoid embedding huge scripts into the report.

(the pastebin url does not show any code)

<?php 
session_start(); 
$alphanum  = "ACDEFGHJKLMNPQRSTUVWXYZ346789abcdefghijkmnopqrtuvwxy"; 
$rand = substr(str_shuffle($alphanum), 0, 5); 
$width=100;
$height=40;
$font = imagepsloadfont("fonts/new.pfb"); 
$im = @imagecreate ($width,$height);
$background_color = imagecolorallocate ($im, 53, 12, 28);
$text_color = imagecolorallocate ($im, rand(200,255),rand(200,255),rand(200,255)); // Random Text
$r=0.20;$g=0.60;$b=0.20;
for ($i=1;$i<=3;$i++) {
         $value=rand(200, 255);
         $randomcolor = imagecolorallocate ($im , $value*$r, $value*$g,$value*$b);
         imagefilledellipse($im,rand(0,$width-10),rand(0,$height-3),rand(20,70),rand(20,70),$randomcolor);
}
imagerectangle($im,0,0,$width-1,$height-1,$text_color);
imagepstext($im, $rand, $font, 32, $text_color, $black, 12, 28);
imagepsfreefont($font);
$rand = strtolower($rand);
$_SESSION['image_random_value'] = md5($rand);   
header("Pragma: no-cache");      
header('Content-type: image/jpeg'); 
imagejpeg($im,'',100); 
imagedestroy($im); 
?>

How about trying to pass the FULL path to new.pfb here:

  $font = imagepsloadfont("fonts/new.pfb"); 

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".