UPDATE: Apple has confirmed to our colleagues at Macworld.com that it is aware of the WiFi problems with the new MacBook Air, but has declined to provide details about the cause of the problem or when the company might have a solution.
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.
9To5Mac cites a source inside Apple who claims that AppleCare and Apple Store Genius Bar employees have been told to "capture" MacBook Airs that are suffering from the WiFi bug, which causes the internet connection to drop out within minutes of getting online. Those units will be sent back to Apple in order for the company to identify the cause, carry out tests and find a solution to the problem.
In addition, several customers who were experiencing WiFi problems have allegedly been able to get replacement MacBook Air units from Apple, with AppleCare and Apple Genius Bar employees informing these customers that their original MacBook Air units have been sent back to Apple for testing.
It's important to point out that this is not confirmation that the MacBook Air has a fault, but suggests that Apple is trying to find out what's going wrong with the affected units. It has been reported that the problem might be caused by the new 802.11ac WiFi capabilities that could be limiting its potential speed, but it's likely that Apple will fix the problem in a future software update. It doesn't appear to have been resolved in the OS X Mavericks developer preview, though.