Joomla 3.3.4 is available, it's a security release fixing 2 main vulnerabilities
• Core XSS Vulnerability
• Core Unauthorised Logins
If your website is under version 3.2.x you'll need to update to 3.2.5 > 3.3.4
If you're running the latest 3.3.3 version just use the Joomla update component
The 3.3.4 has 2 major bug one in the blog layout from the com_content and in the buttons Save as copy" and "Save as new". A Joomla 3.3.5 version is expected in few days.