I have a blog which is hosted as an add-on domain (the other site is not a blog)
The .htaccess file is 644 and very simple:
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]# END WordPress
...however every few minutes the file increases in length with:
# 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
...being appended at the bottom. Within 24 hours the file corrupts and the blog dies with a 500 internal server error.
At the moment I'm holding back the tide by clearing down the file twice a day, but that's just daft.
No new widgets added in the week before this behaviour started and no changes to the other (static) site on the hosting.
Can anyone please help?