--- plugin_manager.admin.inc.orig	2011-04-11 12:38:46.000000000 -0500
+++ plugin_manager.admin.inc	2011-03-20 06:49:56.000000000 -0500
@@ -263,7 +263,7 @@ function plugin_manager_manual_submit($f
   $files = plugin_manager_untar($file->filepath);
   
   // Copy the extracted files
-  if (drupal_function_exists($backend .'_plugin_manager_remove')) {
+  if (function_exists($backend .'_plugin_manager_remove')) {
     $copy = call_user_func_array($backend .'_plugin_manager_copy',
       array($files, $type, $host,
       $user, $pass));
@@ -533,7 +533,7 @@ function plugin_manager_install_3($form,
     $tag = db_query("SELECT lower(tag) AS tag FROM {plugin_manager_taxonomy} WHERE short_name = :short_name AND tag IN ('Modules', 'Themes')", array(':short_name' => $name))->fetchField();
 
     // Copy the extracted files
-    if (drupal_function_exists($backend .'_plugin_manager_copy')) {
+    if (function_exists($backend .'_plugin_manager_copy')) {
       $copy = call_user_func_array($backend .'_plugin_manager_copy',
         array($files, $tag, $form_state['values']['host'],
           $form_state['values']['username'], $form_state['values']['password']));
@@ -683,7 +683,7 @@ function plugin_manager_uninstall_form_s
     }
 
     // Remove the files / folders requested.
-    if (drupal_function_exists($backend .'_plugin_manager_remove')) {
+    if (function_exists($backend .'_plugin_manager_remove')) {
       $remove = call_user_func_array($backend .'_plugin_manager_remove',
         array('sites/all/' . $record->type . 's/' . $record->name, $form_state['values']['host'],
           $form_state['values']['username'], $form_state['values']['password']));
@@ -868,7 +868,7 @@ function plugin_manager_settings_form() 
       '#collapsible' => TRUE,
       '#collapsed' => FALSE,
     );
-    if (drupal_function_exists($backend .'_plugin_manager_settings')) {
+    if (function_exists($backend .'_plugin_manager_settings')) {
       $form[$backend][] = call_user_func($backend .'_plugin_manager_settings');
     }
     else {