The millennium bug's ability to wreak global chaos might have been overstated, but there's still no fool-proof answer to good old human error. Sainsbury scored an e-mail own goal in the run-up to Christmas. A round robin e-mailed to its loyal online customers on December 19 urged them to enter an Air Miles contest ­ "But hurry ­ competition ends 15th December". Oops! {{COUNTERPOINT }}