Often people ask me how important is it to upgrade your WordPress blog or CMS if its 3 or 4 versions out of date? Well its very important! Not only are you missing on great new added features to the system but also expose yourself to less security threats. In the last few days a number of big WordPress blogs have being hacked. Most of the back-doors done by the hackers who are often the guys that are aware of these flaws in older versions of WordPress. Most common hack they do is to add malicious code to the index.php...