WordPress MU

Hello,

I was upgrade to 2.7 but all posts get 404 not found;

-http://music.diaryster.com/ (normal page)
-http://music.diaryster.com/uncategorized/jay-z-kept-grammy-nominated-american-gangster-under-wraps.html (404 Not Found)

This my .httaccess;

RewriteEngine On
#RewriteBase /

#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteCond %{REQUEST_URI} ^.*/wp-admin$
RewriteRule ^(.+)$ /$1/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

What's wrong with my web? please help.

On first look...

#RewriteBase /

should be

RewriteBase /

@shawnkhall

Still 404 error.

When downgarde to 2.6 all blogs fine but when back to 2.7 error 404.

Is some missing?

what steps did you do when upgrading? did you call the upgrade script after you copied the new files?

@Ovidiu

All new files upload via cpanel with overwrite > update config.php > update .httaccess and done.

I was check and error just on 404 posts.

What's mean call the upgrade script?