Microsoft has decided to delay the last service pack for Windows XP.  According the the article at Computerworld, the delay is caused by a compatibility issue  between the POS (Point-of-Sale) application for some retailers and the operating system. The application is called Dynamics Retail Management System (RMS). The company has setup filters so that Windows Update will not offer users the XP SP3 update.

The incompatibilities were only discovered just several days ago. Microsoft recommends users to visit the TechNet forums if they want to learn more about SP3.

There is no word when it will be released.

Source: COMPUTERWORLD