Button changes position (top) after modification in template.php

Hi all,

I have this weird issue with my theme_form_id hook in template.php of my theme. I'm trying to modify a button, but one of them moves to the top of the page after i have modified it trough template.php http://www.dannyjoris.be/files/fora/submit-button-hooks.png . I tried to remove the value from the button by using text-indent: -9999px; but this technique does not work with IE.

I modified 4 buttons all the same way, and one of them ("yourpictures_node_form") starts floating on the top of the form... all help is very welcome...

Cheers,
Danny

This is a snippet of my template.php:

/**
 * Implementation of HOOK_theme().
 */
function merchantmanpub_theme(&$existing, $type, $theme, $path) {
  $hooks = zen_theme($existing, $type, $theme, $path);
  // Add your theme hooks like this:
  /*
  $hooks['hook_name_here'] = array( // Details go here );
  */

 
  
  $hooks['yourpictures_node_form'] = array( 
  		// Forms always take the form argument.
       'arguments' => array('form' => NULL),
     );
  $hooks['faq_node_form'] = array( 
  		// Forms always take the form argument.
       'arguments' => array('form' => NULL),
     );    
  $hooks['simplenews_block_form_1'] = array( 
  		// Forms always take the form argument.
       'arguments' => array('form' => NULL),
     );  
  $hooks['contact_mail_page'] = array( 
  		// Forms always take the form argument.
       'arguments' => array('form' => NULL),
     );

  
  // @TODO: Needs detailed comments. Patches welcome!
  return $hooks;
}








/**
* Theme override for user edit form.
*
* The function is named themename_formid.
*/
function merchantmanpub_contact_mail_page($form) {
  $output = '';
  // Print out the $form array to see all the elements we are working with.
  //$output .= dsm($form);
  // Once I know which part of the array I'm after we can change it.

  // You can use the normal Form API structure to change things, like so:
  // Change the Username field title to Login ID.
  $form['submit']['#value'] = '';

  // Make sure you call a drupal_render() on the entire $form to make sure you
  // still output all of the elements (particularly hidden ones needed
  // for the form to function properly.)
  $output .= drupal_render($form);
  return $output;
}
function merchantmanpub_simplenews_block_form_1($form) {
  $output = '';
  $form['submit']['#value'] = '';

  $output .= drupal_render($form);
  return $output;
}
function merchantmanpub_faq_node_form($form) {
	
	
  $output = '';
  //$output .= dsm($form);
  $form['buttons']['submit']['#value'] = '';
  
  $output .= drupal_render($form);
  return $output;
}
function merchantmanpub_yourpictures_node_form($form) {

  $output = '';
  //$output .= dsm($form);
  $form['buttons']['submit']['#value'] = '';
  
  $output .= drupal_render($form);
  return $output;
}