I do not think this is a theme issue.
Search - what shows on the page when you search? Is there a message there about search not running or something similar?
Quiz - how exactly did you upgrade?
Turn debugging on and then try both things again. Go to upgrade and installation forum and post debug messages there with a full description of process used to upgrade.
Search - what shows on the page when you search? Is there a message there about search not running or something similar?
Quiz - how exactly did you upgrade?
Turn debugging on and then try both things again. Go to upgrade and installation forum and post debug messages there with a full description of process used to upgrade.