hook_menu_alter not working
If your hook implementation is definitely being fired then it does seem likely that another module (or even a theme, potentially) is overriding your changes.

To ensure your module's implementation runs last, you can implement hook_module_implements_alter():

function MYMODULE_module_implements_alter(&amp;$implementations, $hook) {
  if ($hook == 'menu_alter') {
    $group = $implementations['my_module'];
    unset($implementations['my_module']);
    $implementations['my_module'] = $group;
  }
}


If that isn't the problem, it might be something simpler...if your code is copied verbatim then you're setting the title twice for the same path. You might have meant

$items['node/%node/view']['title'] = t('View Event');


Or it might even be a combination of both of those.