BuddyPress.org

I had to reinstall wordpress. I got tons of errors when I try to add buddypress plugin in the latest 3.1 wordpress:

Notice: Undefined offset: 0 in /var/www/html/site/wp-content/plugins/buddypress/bp-core/bp-core-catchuri.php on line 85

Notice: is_page was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. (This message was added in version 3.1.) in /var/www/html/site/wp-includes/functions.php on line 3422

Notice: Undefined offset: 2 in /var/www/html/site/wp-content/plugins/buddypress/bp-core/bp-core-catchuri.php on line 158

Notice: Undefined property: stdClass::$loggedin_user in /var/www/html/site/wp-content/plugins/buddypress/bp-forums.php on line 530

Notice: Trying to get property of non-object in /var/www/html/site/wp-content/plugins/buddypress/bp-forums.php on line 530

Notice: Undefined property: stdClass::$displayed_user in /var/www/html/site/wp-content/plugins/buddypress/bp-core.php on line 1070

Notice: Trying to get property of non-object in /var/www/html/site/wp-content/plugins/buddypress/bp-core.php on line 1070

Notice: Undefined property: stdClass::$profile in /var/www/html/site/wp-content/plugins/buddypress/bp-xprofile/bp-xprofile-classes.php on line 816

Notice: Constant BP_XPROFILE_BASE_GROUP_NAME already defined in /var/www/html/site/wp-content/plugins/buddypress/bp-xprofile.php on line 101

Notice: Constant BP_XPROFILE_FULLNAME_FIELD_NAME already defined in /var/www/html/site/wp-content/plugins/buddypress/bp-xprofile.php on line 102

Notice: Undefined index: fileupload_maxk in /var/www/html/site/wp-content/plugins/buddypress/bp-core/bp-core-avatars.php on line 35

Notice: Undefined property: stdClass::$current_group in /var/www/html/site/wp-content/plugins/buddypress/bp-groups.php on line 223

Notice: Trying to get property of non-object in /var/www/html/site/wp-content/plugins/buddypress/bp-groups.php on line 223

Notice: Undefined variable: count_indicator in /var/www/html/site/wp-content/plugins/buddypress/bp-messages.php on line 115

Notice: Undefined index: action in /var/www/html/site/wp-content/plugins/buddypress/bp-core/bp-core-signup.php on line 571

Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /var/www/html/site/wp-includes/functions.php on line 3387