We stopped using Really Static after upgrading to WordPress 3. However I have re installed it and it is working with WordPress 3.2
We switched back because Alexa said it was taking 2.3 seconds to load a page and sometimes it would even take longer than that. I could tell that web pages were loading faster immediately! Everything seems much faster with Really Static! I will post some graphs as soon as Google updates their web stats to reflect the change in caching programs.