Thank you for your time and effort!

Jetpack should handle this error case better than it currently does, but its settings are site-specific so can't be copied from one site to another.

I believe if you delete those "jetpack_" settings from the other sites as well, you will be able to connect each of the successfully.

Delete those three rows, then try connecting that site again.

SELECT *
FROM agragorwp_47_options
WHERE option_name LIKE '%jetpack%'

and the result was 3 rows. I export it and this is the corresponding insert statement for these rows:

INSERT INTO agragorwp_47_options (option_id, blog_id, option_name, option_value, autoload) VALUES
(244, 0, 'jetpack_activated', '4', 'yes'),
(245, 0, 'jetpack_options', 'a:6:{s:7:"version";s:16:"1.2.2:1332752949";s:11:"old_version";s:16:"1.2.2:1332752949";s:2:"id";i:34576810;s:28:"fallback_no_verify_ssl_certs";i:0;s:9:"time_diff";i:107;s:10:"blog_token";s:65:"Pr!LCw!u04HCBtGKs^kXNkLf#Sz(QZAZ.ZNTXXGV1$VLzhvVkdg%U5Iu^Vxbx$m7j";}', 'yes'),
(254, 0, 'jetpack_active_modules', 'a:11:{i:0;s:10:"vaultpress";i:1;s:5:"stats";i:3;s:13:"subscriptions";i:5;s:21:"enhanced-distribution";i:7;s:10:"shortlinks";i:9;s:19:"gravatar-hovercards";i:11;s:7:"widgets";i:13;s:18:"after-the-deadline";i:15;s:10:"shortcodes";i:17;s:10:"sharedaddy";i:19;s:5:"latex";}', 'yes');

Do you want me to delete these 3 rows?

jetpack_options
jetpack_register
jetpack_activated
jetpack_active_modules
jetpack_do_activate

(Some of those may not exist on your site.)

After deleting those options, try again to connect that site.

If you don't have access to that site's database tables, or are unsure how to delete those options, let us know and we can help.

a template blog which is not visible:
agrotikiagora.gr/template,

and three other blogs created on the following order based on the template blog:
agrotikiagora.gr/ktimamavrika
agrotikiagora.gr/test
agrotikiagora.gr/prueba

I have not copied any tables of prueba to ktimamavrika. But both blogs, as all blogs of the network, are created based on the template blog with the NewBlogTemplate plugin http://premium.wpmudev.org/project/new-blog-template , which I guess is copying tables from the template blog to the new blogs.

Both Akismet and Jetpack are network activated. As stated above, I am using the define('WPCOM_API_KEY','myAPI'); in order to have a common API for all blogs of the network and it works fine for Akismet.
In main blog, I have connected to WordPress.com succesfully in order to have the stats. When trying to connect from my other blogs, I get the error.

P.S. It is too late for me now, I will continue tommorow, OK?

http://agrotikiagora.gr/prueba/

For some reason, your http://agrotikiagora.gr/ktimamavrika/ site is sending the "client_id" for http://agrotikiagora.gr/prueba/, which is confusing Jetpack.

Have you every copied any database tables or WordPress options from prueba to ktimamavrika?

Have you ever installed the old Stats plugin on any of these sites?

I have only seen these settings in a single site installation, correct?

1. Go to your Network Admin → Sites
2. Look up the site you just tried to connect
3. Click the "Edit" link for that site (you'll have to hover over that site's row to make the edit link appear)
4. Click the "Settings" Tab
5. Find the "Siteurl" and "Home" values in the big table and paste them here.

Thanks for your perseverance.

WordPress Address (URL)
Site Address (URL)

[Edited by mdawaffe: Thanks for the URL]

Could you try once more please?

Also, could you please paste the full URL of that error message here?

I am dreaming of the prize...

Could you please try reconnecting one of the non-main-blog sites again? We have added some debugging on our side that may help determine the problem.

Sorry for the hassle, but thanks for the help.

Otherwise try installing the Jetpack Compatibility Plugin so we can see some additional information from your site.

1) Download the plugin from http://plugins.svn.wordpress.org/jetpack/branches/jetpack-compatibility-test.zip
2) Upload the plugin to your site via Dashboard -> Plugins -> Add New.
3) Activate the plugin and go to Plugins -> Jetpack Compatibility Test.
4) Click the "Select All" button.
5) Send the results of the test back in a reply.

Also make sure you are running the latest WordPress and Jetpack version:
http://www.wordpress.org
http://www.jetpack.me

Looking forward to your reply.

I am building a mulstisite network with subdirectories. I have installed Akismet and Jetpack network-wide. I have set a gloabl API key in my config file define('WPCOM_API_KEY','myAPI');

Akismet works fine in all blogs.
My main blog connects succesfully to Worspress.com.
In all other blogs, when trying to connect to Worspress.com I get the error:

Invalid request, please go back and try again.
Error Code: invalid_request
Error Message: Mismatch in redirect_uri.

Can you please tell me what is wrong?

In addition, is it possible to use the same account gloabally for all blogs to connect to Worspress.com Stats, similar to Akismet?

Thank you
Blog url: http://www.cmavrikas.gr/blog/