My client got some special old software which reads one special rss channel. Problem is, that when the rss contains a comment, the software throws error. And wp-super-cache adds
<!-- Cached page generated by WP-Super-Cache on $timestamp --> and
\n<!-- Dynamic page generated in $duration seconds. -->\n
at the and of the page
i had to edit wp-cache-phase2.php and delete those comments, but it is against easy upgradability and i do not know if it would not broke something as you are testing
preg_match( '/(Cached page generated by WP-Super-Cache on) ([0-9]*-[0-9]*-[0-9]* [0-9]*:[0-9]*:[0-9]*)/' for something on wp-cache.php
so plese could you add option to turn the message off or tell me if there is some filter at the end of caching, so i can filter the result and delete those notices.