Yes to the settings.
Permissions: Ok there may be something here. I can access the ftp of the live site host and I just noticed something.
I can give the uploads directory all permissions (write read execute: 777) however wordpress will create a dir for a new user avatar (uplaods/avatars/59 for ex) but it cant upload files inside it. Apparently any directory I create with the ftp user has a different owner than the directories created by wordpress itself and even though permissions are set to 777 wordpress is giving me a write permission error when trying to upload any new avatar.
Yes, actually you can try almost all avatars, you can inspect element on the test site and see the address and just substitute the domain name. e.g:
http://amsofac.org.mx/wp-content/uploads/avatars/14/52051200b90f99a798223d0f735d0a66-bpthumb.jpg
