Function set_value() not working as expected

[eluser]Unknown[/eluser]
If you are still struggling with set_value() to repopulate form values.
Just use traditional php way of doing :

e.g

<input type='text' name='firstname' value="<?php echo set_value('firstname'); ?>" />

replace with ---

<input type='text' name='firstname' value="<?php echo (isset($_REQUEST['firstname'])) ? $_REQUEST['firstname'] : ''; ?>" />

and bingo it works like charm...