I have a custom content type, Picture, which has only a single required image field. Since this field is required, I thought that it should be impossible for users to save a node without uploading a file, but every once in awhile there is a node created that has no file uploaded.
Users have permission to create nodes of type Picture but not to edit them.
To try to troubleshoot this problem, I would like to record the user agent information (browser, etc.) of users when they create nodes of this content type. Is there a "standard" way to go about this?
I'm on Drupal 7 if it matters.