Database schema version (3.2.3-2014-02-20) does not match CMS version (3.2.3)
From Joomla! Documentation
Revision as of 10:55, 6 March 2014 by Pe7er
After updating Joomla to version 3.2.3 (using MySQL database), the Extensions > Extension Manager > Database > [Fix] shows "Warning: Database is not up to date!"
1 Database Problem Found:
Database schema version (3.2.3-2014-02-20) does not match CMS version (3.2.3).
What is the cause
Probably an error with the database check functionality. When you get the error above, there's probably nothing wrong with your database
How to fix
Apparently this check will be fixed in the next Joomla version: https://github.com/joomla/joomla-cms/commit/b382d19b2ae5dcb320c56628b237545bbb31b2cd