I also got the Airport Express 6.2 update and found it caused problems on my network. I use a WPA network, and the 6.2 update only allows you to choose WPA2. I presume this standard is meant to be backward compatible with WPA, but in my case it didn't work - the updated Airport Express just kept flashing orange. I tried updating the other one as well (I have two) and it had exactly the same problem. Downgrading to 6.1.1 solved the problem on both. I use a Billion 7402G modem/router/access point.