Thank you for your input.
Facebook all worked just fine for me. Last week I updated to 1.6 and since then I am getting this same error message
{"error":{"message":"Error validating verification code. Please make sure your redirect_uri is identical to the one you used in the OAuth dialog request","type":"OAuthException","code":100}}
I just tried to replace the site_url() with home_url() which I found on three different pages, but then my Facebook login button was missing. I am just a casual programmer with limited knowledge, could you let me know which pages you edited?
