i had an acational white page of deth on the front of my website (the admin area worked fine).
the peoblem came and went, without consistency.
when i deleted the line:
define( 'WPCACHEHOME', 'public_html/wp-content/plugins/wp-super-cache/' ); //Added by WP-Cache Manager
from the file WP-CONFIG, everything became ok...
just wanted to say.