I am using a slighty modified i-feel-dirty theme http://www.thestottfamily.co.uk/
When clicking the Tag cloud I get a 404.php error when using mod rewrite but get the search results i expect when it is disabled.
I have changed the .htaccess file to 0644 (after searching on the forum) but still suffer the same problems.
I am sure i did not suffer from this before 188.8.131.52
I am running 184.108.40.206  (Debug build)