subject line is from someone who i also am having same problem with. here is link:
http://wordpress.org/support/topic/wp-contentcache-folder-at-20-gb
in my case, my cache folders filled up so much hosting deactivated my account. why isn't folder removing cache content? i am using most recent upgrade. what is weird is it is only happening on 3 or 4 wp blogs on my account and not all 12 blogs. they all have exact same configs.
