There seems to be an error when importing a language .xml with many phrases via the Language Importer. Reproduce in debug mode: 1) Export the English (US) language (βeta 5) with all XenForo phrases. 2) Edit the downloaded file and change the title value to something else, ex. <language title="English (US)"> to <language title="English (US)2">3) Save and try to import the "new" language from the admin.php?languages/import page. I get: If I split the file (remove half of the phrases), it will get imported, no matter which phrases got deleted. I played with the php and mysql config files, but hadn't any luck.