Wordpress deki moderator adam senin sorunun icin söyle yazmis baska birisine :
Alıntı
get_taxonomies_for_attachments() is a new function introduced in 3.5 and is defined in wp-includes/media.php
If your getting an undefined function error for it you still have the old media.php file and your update failed.
You will need to manually re install 3.5 following the codex Manual Update instructions.
Özeti wordpress 3.5 i manuel olarak tekrar update yapman gerek demis ..ayni sorun seninkiyle sayfa surda : en sonunda manuel update linkine tiklayincada nasil yapacagini gösteriyor :
http://wordpress.org/support/topic/f..._attachments-1