The WordPress system is upgraded fairly regularly. That’s a good thing, for a number of reasons. In addition to providing new features, upgrades address critical security issues and patch annoying bugs.
However, the only way to benefit from WordPress upgrades is to actually install them. Many hosting services even offer a simple one-click upgrade. If that’s the case, then there’s almost no reason why you should delay in upgrading when a new release is available.
Manual upgrades are also fairly easy (remember, WordPress is the blogging system that takes only five minutes to install). This video demonstrates the manual upgrade process and discusses some of the precautions you’ll want to take before you perform an upgrade.
Before you update, be sure to backup your site.