"The older file formats that are now blocked are in decreasing day-to-day use, but the blocking of them will make retrieval of archived material more difficult," states an article on News.com.
This is clearly a huge issue for SMBs--many of which are still using the 2003 version of Microsoft's software suite--not to mention the companies they do business with. "Office 2003 just peaked in its installed base last year, probably at around 60 percent of business users," says Michael Silver, research vice president at Gartner.
For more ways SP3 affects the way Office 2003 works, click here.CNET News.com