I would first like to thank Merlin for all his work with this latest release. He and the developers at Linksysinfo.org are the reason why I prefer Asus products.
I just purchased the AC68U; flashed .50 without any problems. I decided to enable AiProtection. About an hour afterwards, I was informed by my wife that her Asus Transformer T100TA (Windows 8.1) could not connect to specific sites, such as, Bank of America. She is using Chrome as her main browser. With a lot of fooling around with the Transformer and the AC68U, I found that if I enabled any option in AiProtection, this issue would occur. Disabling AiProtection, the problem went away. While trying to determine what was going on, I also tried using Firefox and the symptoms were even worse ... the browser would not open at all until AiProtection was turned off and the network connection was reset. With both browsers, I disabled all plugins/extensions, which did not help in anyway. Of course this issue did not occur on my main machine.
Any suggestions to alleviate this issue if I turn AiProtection back on? Getting rid of the Transformer is not one of them ... she loves the thing.