If you would like to make it less confusing for your members to sign up - change your v4.1 (IQ) /simg/simg.php file as follows:

Find:
Code:
$chars = array("a","A","b","B","c","C","d","D","e","E","f","F","g","G","h","H","i","I","j","J",
			   "k","K","L","m","M","n","N","o","p","P","q","Q","r","R","s","S","t","T",
			   "u","U","v","V","w","W","x","X","y","Y","z","Z","2","3","4","5","6","7","8","9");
Replace with:
Code:
$chars = array("A","B","C","D","E","F","G","H","J",
			   "K","M","N","P","R","S","T",
			   "U","V","W","X","Y","Z","2","3","4","5","6","7","8","9");
and a few lines below that, change it to only show 6 characters/numbers:

Code:
for ($i = 0, $length = 8; $i < $length; $i++) {
Change to:

Code:
for ($i = 0, $length = 6; $i < $length; $i++) {