I am having the same problem .. I have 4S
I sent an email to whatsapp support regarding the issue
They said they will fix it in the next update
All of you who are having the same problem .. Send them so they can fix it quickly!
This was their reply
Hi,
Thanks for your message.
If you have upgraded to iOS 6 and you are encountering issues on WhatsApp related to the following: Contacts not showing and Profile Pictures syncing, please keep reading.
In order for WhatsApp to properly work with your iPhone's Contacts, you will need to give the app permission to use the Contacts from your phone. If you denied permission after updating to iOS 6, you can grant permission by going to your iPhone Settings:
- iPhone Settings > Privacy > Contacts
- Turn WhatsApp to ON
- Reboot your phone, then launch WhatsApp
Your WhatsApp should now be able to properly use the names from your Contacts, as well as Refresh your Favorites list.
Thank you for informing us about the issues you are experiencing. I understand your frustrations, and apologize for any inconvenience. Profile picture syncing will be fixed in the next version of WhatsApp. Unfortunately we cannot comment on any future timelines, sorry. We appreciate your patience and support of WhatsApp.