We recently moved a client's blog from a subdomain to a subfolder and their permalinks no longer work. We've had WordPress rewrite them but each time we click a link we get a 404error page.

Below is what we have in our .htaccess file.

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

Any ideas why this doesn't work?