The latest release of WP Super cache 1.4.1 is creating havoc on some our customers sites. On one site all not logged in users got was a white screen.
These are the PHP notices that show in this release that are causing the trouble - roll back to version 1.4.0 and they don't exist and the conflicts disappear .
PHP Notice: Undefined variable: wp_cache_no_cache_for_get in /wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 252
PHP Notice: Undefined variable: wp_cache_object_cache in /wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 258
PHP Notice: Undefined variable: wp_cache_request_uri in /wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 264
Please apply a patch and update release an update when you can. Until then I think it best people do not update to the latest version.