If I try to upgrade from 3.3.2 to 3.4.x I get a problem with Dashboard. The access to it is broken.
I use WordPress on IIS 7.5 with MS SQL 2008 R2 and MS SQL 2012 php_sqlsrv.dll file. The system runs normal with WordPress 3.3.2. After an upgrade to 3.4.x I'm not able to login to Dashboard. I get only an error message "The website cannot be shown." (original in german: "Die Website kann diese Seite nicht anzeigen.").
In the php-error file I found the following:
[03-Jul-2012 05:12:03 UTC] PHP Fatal error: Call to undefined method sqlsrv_wpdb::delete() in C:\inet2pub\www2\wp-includes\option.php on line 370
What does this mean? It seems to me WP 3.4.1 use a new function to connect to MySQL database and therefore it is missing a redirection to the MSSQL database. Maybe it is something else?
Please for help.