It was tested while
WP was still in beta, and things in general appeared to be ok. In the last few days with customers actually completing the upgrade to WP3.1, we have been notified of a couple of minor issues, one of which can be resolved with a setting change in the ClassiPress admin, the other appears to be a known issue with the latest WordPress version relating to TinyMCE, but a manual fix has been provided. Again, not major issues effecting the functionality of the theme.