Apple confirmed this week that there was a noise issue with some of its dual-processor Power Mac G5s and said the issue has been fixed on new machines. “The problem, which appeared on dual 1.8GHz machines, created a beeping or hissing noise on some machines when used in conjunction with professional external audio gear. An Apple representative told CNET that a ‘small number’ of customers have experienced the problem, which has been fixed in production. The company said any customers experiencing the issue should contact the company’s customer support.”