Donncha, thank you very much. With 0.9.3 version now all my blogs run OK. I have a question, I've seen a new plugin folder in the WP Super Cache folder. Which is its function and how to activate it? I've been working until now with the Bad Behavior hack:
require_once( ABSPATH . 'wp-content/plugins/bad-behavior/bad-behavior-generic.php');
if (! ($meta = unserialize(@file_get_contents($meta_pathname))) ) return;
Don't need this anymore?