Adding classes to block title
The way to do this is by overriding variables in the template. Put the following code in your themes 'template.php' file, replacing YOURTHEME, YOURBLOCK, YOURCLASS with the obvious.

/**
 * Override or insert variables into the block template
 */
function YOURTHEME_preprocess_block(&amp;$vars) {

  // var_dump($vars);

  $block = $vars['block'];

  if ($block-&gt;delta == 'YOURBLOCK') {
    $vars['title_attributes_array']['class'][] = 'YOURCLASS';
  }

}


You can determine what the $block->delta is for example by doing a var_dump($vars) in the function. If you have the DEVEL module installed you can use dsm($vars) which gives the dump some presentation.