you can also use a .htaccess hack if you use Apache
It`s compatible with 2.8.5 on my blog
Yeeha,
no more W3C validation errors
this plugin is out-dated 🙁
the only thing you have to do is enable the plugin and make the caching folder
as in the readme
Having the same problem
running on php 5.2 / mysql 5.0
WordPress 2.7.1, enabled Akismet and WP Stats
I`ve updated to the latest K2 nighty build, problem has been fixed.