Quote
matt
we use wp-super-cache on piwik.org and pages are cached for me?
I'm not sure how because constantly changing cookie values will destroy the ability of any properly-working cache which is using Vary: Cookie (typically used for auth) to do its job.
Possibly you don't have your cache set up to use Vary: Cookie.
For those of us trying to use caching properly this is very much an issue.