various errors after updating to unstable5

I just updated from unstable4 to unstable5 and now when I edit a node and try to add media I get the following errors:

Notice: Undefined index: file_entity_add_upload in drupal_retrieve_form() (line 760 of /mysite/includes/form.inc).
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'file_entity_add_upload' not found or invalid function name in drupal_retrieve_form() (line 795 of /mysite/includes/form.inc).

I have a multilingual Drupal 7.14 site.

When I go to the reports admin page (to look up which version of Drupal I'm currently running) I get the following error messages (which I did not get prior to updating):

Warning: file_get_contents(sites/all/libraries/colorbox/colorbox/jquery.colorbox-min.js): failed to open stream: No such file or directory in _locale_parse_js_file() (line 1482 of /home/cpelham/public_html/crsny.org/public/includes/locale.inc).
Warning: file_get_contents(sites/all/libraries/colorbox/colorbox/jquery.colorbox-min.js): failed to open stream: No such file or directory in drupal_build_js_cache() (line 4841 of /mysite/includes/common.inc).