Duplicate UI errors in Contact Details - Identities

[Sim]

Using 1.1.0-b2 (new installation), I go to my account user profile, Contact Details, Identities, type something in any of the identities fields (Facebook/Skype/Twitter/etc), then I get a error displayed:

The field 'custom_fields[skype]' was not recognised.

 

[Paul B]

Duplicate: http://xenforo.com/community/threads/the-field-custom_fields-xxxxxx-was-not-recognised.20864/