Since the release of the new 11in and 13in MacBook Air at WWDC earlier this month, users of the new models have been reporting WiFi issues. According to new reports, Apple is aware of the problem and is working to pinpoint the cause in order to provide a fix. Plus, Apple is apparently giving some customers replacement MacBook Airs.Related StoriesAnother working Apple-1 pops up, could sell for $500KUsers report internet loss with new MacBook Airs