Ugh, lame. Well, knowing there are two batches of radios out there, it made us dig into another issue we see: Lots of wireless disconnects and high packet latency. It seems that the older 300-25's are the radios that are responsible for frequent brief disconnects (without a reboot) from the AP and periods of high latency (30 - 50ms). The newer 300-25's do not experience this. I have no idea if this is just a coincidence or not but we have been chasing weird issues on all 4 of our 3000 towers since installing them. We have RMA'd two 300-25s for being DOA. Another was RMA'd for having the Ethernet pins in the radio being too recessed so it would not make an Ethernet connection (but it would power). Another is sitting on my desk for trouble shooting. It would stop passing traffic to the customer router until a reboot but other than that, seemed to be working normally.
All of our radios are runing 4.4.1.