NATION

NATION
Computer problem causesoverbilling at Wal-Marts
DENVER -- A computer hardware problem caused more than 800,000 credit and debit card transactions to be double- or triple-billed last week at Wal-Mart stores nationwide, according to officials at First Data Corp., which handled the electronic payments.
The excess Visa and Mastercard charges, which occurred Wednesday and were posted Thursday, have been reversed, First Data spokeswoman Staci Busby said Sunday.
She said it's unclear how many customers were affected, and that she had no other details about the hardware problem.
GM prepares to unveilbeefed-up Cadillac STS
DETROIT -- General Motors Corp. is ready to unveil the latest addition to its beefed-up premium Cadillac brand: a luxury performance sedan that replaces the Seville.
GM is scheduled to introduce the 2005 Cadillac STS during media preview days Wednesday at the New York International Auto Show.
The STS will be available with a 255-horsepower V-6 engine and rear-wheel drive, or a 320-horsepower V-8 with either rear-wheel or all-wheel drive. It's slated to reach showrooms in the fourth quarter of the year with a cost starting at slightly above $40,000.
Associated Press