I am also on 2.7.2 and the device will not hold a connection to the WIFI as a Client.
I am going to reach out to support, as the connection barley lasts 90 minutes. The only fix is resetting the unit at this point. I use the unit with a WPA2-EAP environment, which is probably very unique, however we purchased it for this purpose.
I did review the syslog and kernel log, but they are not as helpful as I had hoped.
Other then the stability issue I really like the product.