I'm the customer John posted on behalf of.
I have a constant ping opened up to a wifi nic that is testing on these networks. The curious thing is after a change applies the nic will respond to a ping for a short time say 5 seconds to a minute depending but over time it will fail, the pings time out and the card sits at "attempting to authenticate." I've attempted this with upper case, lower case, and symbols both with and without spaces. From my tests the failure only occurs when the space is in the passphrase. We even tried a passphrase consisting only if 8 spaces. It too will connect for a short while then fail.
The firmware version is 6.3.1.4.-4.0.0.6_44126
AP model 115