(fast) frisches Wordpress: Upgrade auf neue Version -> PHP Fehler

hi,

ich habe hier zwei Blogs, die produzieren nur Fehler:

Blog 1:

Warning: mysql_num_fields(): supplied argument is not a valid MySQL result resource in htdocs/wordpress/wp-includes/wp-db.php on line 251

Warning: mysql_fetch_object(): supplied argument is not a valid MySQL result resource in htdocs/wordpress/wp-includes/wp-db.php on line 256

[...]

Warning: Cannot modify header information - headers already sent by (output started at htdocs/wordpress/wp-includes/wp-db.php:251) in htdocs/wordpress/wp-includes/classes.php on line 176

[...]

Blog 2 Upgrade von 2.2.2:


Notice: Undefined index: sidebar-1 in htdocs/wordpress/wp-includes/widgets.php on line 201
#

Notice: Trying to get property of non-object in htdocs/wordpress/wp-includes/classes.php on line 442

Notice: Trying to get property of non-object in htdocs/wordpress/wp-includes/post.php on line 925

Warning: Cannot modify header information - headers already sent by (output started at htdocs/wordpress/wp-content/themes/default/functions.php:83) in htdocs/wordpress/wp-admin/admin-header.php on line 2

Notice: Undefined index: fat in htdocs/wordpress/wp-includes/script-loader.php on line 217
Notice: Undefined index: prototype in htdocs/wordpress/wp-includes/script-loader.php on line 217
Notice: Undefined index: interface in htdocs/wordpress/wp-includes/script-loader.php on line 217
Notice: Undefined index: jquery in htdocs/wordpress/wp-includes/script-loader.php on line 217

[...]

Bei beiden sind keine Plugins aktiv und es wird das Standard Theme verwendet.

triela:~# dpkg -l | grep mysql
ii libdbd-mysql-perl 3.0008-1 A Perl5 database interface to the MySQL data
ii libmysqlclient15off 5.0.32-7etch4 mysql database client library
ii mysql-client-5.0 5.0.32-7etch4 mysql database client binaries
ii mysql-common 5.0.32-7etch4 mysql database common files (e.g. /etc/mysql
ii mysql-server 5.0.32-7etch4 mysql database server (meta package dependin
ii mysql-server-5.0 5.0.32-7etch4 mysql database server binaries
ii php5-mysql 5.2.0-8+etch9 MySQL module for php5
You have new mail in /var/mail/root


[edit]

Die anderen Blogs bringen ähnliche Meldungen:

zb. "supplied argument is not a valid Directory resource in ...."

also WP 2.3.2 ging mal gnadenlos in die Hose



jemand eine Idee?