Gmail profile picture cannot get uploaded although Google+ did.

I solved this by doing the following:

1. Go to your Gmail window. On the left there is a red "Gmail" and a triangle on its right. Click on the triangle and select "Contacts". Then a new window/tab should pop up.
2. In the new tab, find yourself on the contact list and click.
3. click on the profile picture icon to set profile photo.
4. choose the picture you want or upload a new one. Save.
5. Go back to Gmail and try sending an email. Now your profile picture should be updated


My answer can be found here : https://webapps.stackexchange.com/questions/39365/when-i-change-my-gmail-avatar-image-why-doesnt-it-update-everywhere/111829#111829