404 – "The requested URL /index.php was not found on this server"

Hello guys, I’m asking for your help, I’m short of solutions on my case.

I’ve moved a few days ago my wordpress into anotehr directory following the steps described there. After a few hours of search, I finally understood I needed to update my permalinks to fix it. It worked fine since.

Then I tried today to use the WP Super Cache plugin, which required different permalinks than the default one, so I changed them to custom and it broke it all again. :yay:

I tried reverting the permalinks, I tried the Velvet Blues Update URLs plugin, nothing seems to be enough to solve that crap.
I suppose my problems are located in .htaccess files but they don’t look really wrong to me, I’m proably not aware of the error…

They look like this : wp directory

SetEnv PHP_VER 5
SetEnv REGISTER_GLOBALS 0
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

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

# END WordPress

main site directory

SetEnv PHP_VER 5_3
SetEnv REGISTER_GLOBALS 0

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

# END WordPress

My wordpress directory is /blog
If you need additionnal info just ask.

Thanks in advance.