Tried this on a clean install of wordpress and yslow shows:
Grade E on Add Expires headers
There are 4 static components without a far-future expiration date.
(no expires) /wp-content/themes/twentyten/style.css
(no expires) /wp-content/themes/twentyten/images/wordpress.png
(no expires) /wp-content/themes/twentyten/images/headers/path.jpg
(no expires) /favicon.ico
and
Grade B on Compress components with gzip
There is 1 plain text component that should be sent compressed
/wp-content/themes/twentyten/style.css
Managed to sort out a white screen problem when clearing cache by adding xcache.admin.enable_auth = Off to the php.ini using xcache on the server.
Any ideas?? Many thanks in advance....steve
wp-content directory is set to 755