Got rid of Wordpress spam

I have finally updated to the latest version of Wordpress and detected several different spam attempts in my blog.

• The index.php and wp-content/index.php files contained a couple of unwanted links (their size should be less than 100 bytes).
• One of my posts had some invisible links added at its end. One to a chinese site, disguised with the unescape Javascript function and others hidden by setting the style to display: none.