Hi Celinal, have you been able to resolve this issue? I get the same blank screen here. WP 3.1.2 MU + QC 2.3.6 on GoDaddy 4GH hosting. Admin area, logged in users, and excluded GET request work fine, but all other supposedly cached request return a blank page.
I get no warning or error in admin and cache files are created in cache folder on the server but apparently won’t get served to the user.
Got a similar setup at another hosting provider but with additional Domain Mapping plugin and everything is working fine.
