Confluence has been updated to the 3.2 branch.
Release notes are here:
http://confluence.atlassian.com/display/DOC/Confluence+3.2+Release+Notes
http://confluence.atlassian.com/display/DOC/Confluence+3.2.1+Release+Notes
3.2 introduces the Documentation and Easy Reader themes.
http://confluence.atlassian.com/display/DOC/Configuring+the+Documentation+Theme
http://confluence.atlassian.com/display/DOC/Configuring+the+Easy+Reader+Theme
We have removed the version 2 Left, Top and Left, and Clickr themes due to bugs; These themes were deprecated and are scheduled to be completely removed from a future release any way.