I don't have authentication errors, but on my Galaxy Nexus, it always keep connecting and disconnecting on 5Ghz, didn't have this issue on 2.4Ghz.
After i changed channel from 149 to 36, it worked for me and didn't keep disconnecting as per this:
Fix For Nexus 4 4.3 5ghz Wi-Fi issue - Android Forums at AndroidCentral.com
Not sure if it helps u or not
After i changed channel from 149 to 36, it worked for me and didn't keep disconnecting as per this:
Fix For Nexus 4 4.3 5ghz Wi-Fi issue - Android Forums at AndroidCentral.com
Not sure if it helps u or not

