What steps will reproduce the problem? 1. Run example script /osapi/examples/listFriends.php?test=google3legged 2. User is been redirected to google universal login:

https://www.google.com/a/UniversalLogin?continue=https%3A%2F%2Fwww.google.com%2Faccounts%2FOAuthAuthorizeToken%3Foauth_token%3D4%2F99nXWnagMtXMFs4YyAbXF_kqYfNn%26oauth_callback%3Dhttp%253A%252F%252Fdev.dex.co.il%252Fosapi%252Fexamples%252FlistFriends.php%253Ftest%253Dgoogle3legged%2526oauth_continue%253D1%2526token%253D4%252F99nXWnagMtXMFs4YyAbXF_kqYfNn%2526key%253DsM2Yty3eLSxpj%2BGywUL0Qv1P%26hd%3Ddefault&continue2=https%3A%2F%2Fwww.google.com%2Fa%2F%7B%7Bdomain%7D%7D%2FOAuthAuthorizeToken%3Foauth_token%3D4%2F99nXWnagMtXMFs4YyAbXF_kqYfNn%26oauth_callback%3Dhttp%253A%252F%252Fdev.dex.co.il%252Fosapi%252Fexamples%252FlistFriends.php%253Ftest%253Dgoogle3legged%2526oauth_continue%253D1%2526token%253D4%252F99nXWnagMtXMFs4YyAbXF_kqYfNn%2526key%253DsM2Yty3eLSxpj%2BGywUL0Qv1P&spl=true&btmpl=authsub

3. User is redirected back to application:

/osapi/examples/listFriends.php?test=google3legged&oauth_continue=1&token=4%2F99nXWnagMtXMFs4YyAbXF_kqYfNn&key=sM2Yty3eLSxpj+GywUL0Qv1P&oauth_token=4%2F99nXWnagMtXMFs4YyAbXF_kqYfNn

4. Php error:

<b>Fatal error</b>: Uncaught exception 'osapiException' with message 'Error requesting oauth access token, code 400, message: signature_invalid base_string:GET&amp;https%3A%2F%2Fwww.google.com%2Faccounts%2FOAuthGetAccessToken&amp;oauth_consumer_key%3Danonymous%26oauth_nonce%3Dce5d7c877689466772d01e08a3bb964b%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1252589771%26oauth_token%3D4%252F99nXWnagMtXMFs4YyAbXF_kqYfNn%26oauth_version%3D1.0

' in C:\dev\dex_v2\src\osapi\auth\osapiOAuth3Legged.php:115 Stack trace:

0 C:\dev\dex_v2\src\osapi\auth\osapiOAuth3Legged.php(81):

osapiOAuth3Legged-&gt;upgradeRequestToken('4/99nXWnagMtXMF...', 'sM2Yty3eLSxpj G...')

1 C:\dev\dex_v2\src\examples__init__.php(115):

osapiOAuth3Legged::performOAuthLogin('anonymous', 'anonymous', Object(osapiFileStorage), Object(osapiGoogleProvider), 'kogg6dvrhv2vuuf...')

2 C:\dev\dex_v2\src\examples\listFriends.php(18):

require_once('C:\dev\dex_v2\s...')

3 {main}

thrown in <b>C:\dev\dex_v2\src\osapi\auth\osapiOAuth3Legged.php</b> on line <b>115</b><br />

All other providers work. I have tried with also with "OAuth for Web Applications" key and secret and got the same error.

I'm using revision 192.

I have noticed that in OAuthGetAccessToken request the oauth_verifier parameter does not exists as suggested by Google's documentation: http://code.google.com/apis/accounts/docs/OAuth_ref.html#AccessToken