affected site: wpmu 2.8.2 + wp super cache 0.9.6
if you activate;
HALF ON Super Cache Disabled, only legacy WP-Cache caching.
Don't cache pages for logged in users.
internet explorer 7 and sometimes ie6 getting dnserror in my site.. i dont know why.. but i disable "Don't cache pages for logged in users." and tadaaa.. site is fixed..
probably a bug