|Status:||reviewed & tested by the community|
Noticed this after upgrading to 7.x-1.1 today -- happens when saving from the "Manage Display" tab on Content Types:
Notice: Undefined index: title_value in link_field_update_instance() (line 1305 of /var/www/foo/public/sites/all/modules/link/link.module)
This appears to fire once for each field regardless of whether or not it's a link. This is happening to me for content types that do not have link fields in them. The implementation of link_field_update_instance does not appear to do any testing to see if the field being modified is a link field.
This sounds similar to the bug at http://drupal.org/node/949604, but the error is happening in new code.