gnome-contacts: folks-WARNING when saving new contact data

[S. Neumann]

I cannot add any new contact information to existing persons in my address book. I receive error message like the following ones when I start gnome-contacts with the terminal:

(gnome-contacts:23989): folks-WARNING **: url-details.vala:91: Empty URI passed to UrlFieldDetails.

(gnome-contacts:23989): folks-WARNING **: email-details.vala:55: Empty e-mail address passed to EmailFieldDetails.

(gnome-contacts:23989): folks-WARNING **: phone-details.vala:72: Empty phone number passed to PhoneFieldDetails.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-contacts 3.10.1-0ubuntu1~saucy1 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Thu Dec 26 02:14:58 2013
InstallationDate: Installed on 2013-10-07 (79 days ago)
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
MarkForUpload: True
SourcePackage: gnome-contacts
UpgradeStatus: Upgraded to saucy on 2013-10-29 (57 days ago)