Nothing is being saved

Hey I am having a problem where if i add a widget, activate a plugin, change the ad code to a different ad nothing is being saved. It says saving/saved but nothing is saved. I can make new post and what not but everything else just isnt saving

any idea why this is happening?
Only thing i changed was when i contacted the host and told them to take of the cache because i was changing the theme and needed to see instant updates

i doubt that is the reason any help would be useful thanx

below is my .htaccess

# BEGIN WPSuperCache
# END WPSuperCache

# 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

<Files 403.shtml>
order allow,deny
allow from all
</Files>

deny from 41.155.

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule .* – [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
</IfModule>