Upgrade to 2.2 – Dashboard doesn’t work

Hello,

after the upgrade from 2.1.3 to 2.2, the dashboard doesn’t show the ‘Other WordPress News’, ‘WordPress Development Blog’,
and the ‘Incoming Links’, but a ‘Forbidden’ message.

The server error log shows the following:

mod_security: Access denied with code 403.
Pattern match “!(^application/x-www-form-urlencoded$|^multipart/form-data;)” at HEADER(“Content-Type”)
[severity “EMERGENCY”] [uri “/wordpress/wp-admin/index-extra.php?jax=incominglinks”]
(…) [uri “/wordpress/wp-admin/index-extra.php?jax=devnews”]
(…) [uri “/wordpress/wp-admin/index-extra.php?jax=planetnews”]

My server is running MySQL 4.1.20 and phpMyAdmin 2.8.2.4.

Any ideas?

Thanks,