I believe I have figured out the solution to a nagging, nonsensical problem.
If you see many Canopy PMP450 clients, including those with great signal/SNR, disconnecting / re-registering at a site where the APs are synced by a CTMExpress8, try rebooting that sync device. Even if its stats shown in the APs look fine. These are usually very reliable, I'm guessing there may be GPS constellation changes affecting central Canada where we are located.
