image upload problem in 3.0.1

hi
i cant upload image after i upgrade my wordpress to 3.0.1
the permission of all these folders are 777
public_html
wp-content
uploads

and its my .htaccess :

# 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

check these links :
https://s2.kimag.es/share/85777047.png
https://s2.kimag.es/share/14093233.png
https://s2.kimag.es/share/21101626.png

please help , im freaking out of this problem ??