Permalinks problem

Hi there,

This is a bit frustrating. I’ve already searched these forums and other websites and applied various solutions, including the /index.php/2009/… rewrite.php solution, to no avail.

Here is what happens:

When setting a custom permalink, the resulting URLs return a 404 error.

Here is the information in the .htaccess file:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>
# END WordPress

This file currently has a chmod of 666. I’ve tried it with 777 as well.

The server environment is:

Apache 2.2.3 (Red Hat)
PHP 5.1.6
MySQL 5.0.45
WordPress 2.7.1

And mod_rewrite is installed and active, according to the server admin.

Here’s a list of all the other modules loaded into Apache right now (taken from a phpinfo() call):
core prefork http_core mod_so mod_auth_basic mod_auth_digest mod_authn_file mod_authn_alias mod_authn_anon mod_authn_dbm mod_authn_default mod_authz_host mod_authz_user mod_authz_owner mod_authz_groupfile mod_authz_dbm mod_authz_default util_ldap mod_authnz_ldap mod_include mod_log_config mod_logio mod_env mod_ext_filter mod_mime_magic mod_expires mod_deflate mod_headers mod_usertrack mod_setenvif mod_mime mod_dav mod_status mod_autoindex mod_info mod_dav_fs mod_vhost_alias mod_negotiation mod_dir mod_actions mod_speling mod_userdir mod_alias mod_rewrite mod_proxy mod_proxy_balancer mod_proxy_ftp mod_proxy_http mod_proxy_connect mod_cache mod_suexec mod_disk_cache mod_file_cache mod_mem_cache mod_cgi mod_version mod_perl mod_php5 mod_proxy_ajp mod_python mod_ssl

I’ve tried switching to the default theme and turning off all plugins. Still, the permalinks have not worked.

Any ideas? Any help is tremendously appreciated!