What type cards are you guys using? I tested with an 8602 and it was the same old problem. Are you using SR2s?
We have already dropped SR2's from our network and put 8602+'s in due to the association problem, So far 4 towers upgraded and running better than ever. No association problems when changing the interface, and is it just me or is the signal strength 1000x better?
Example, a client with dynamic ACK 200 did report -85/-88 signal at 2Mb/s. NOW after upgrading to 2.9.45 the same client now reports -76/-80 ROCK SOLID!! this example is system wide across all of our clients on atheros driven MT towers now running 2.9.45
Top job MT team.