What version of ZD firmware, what kind of clients, and what kind of WLANs?
Which one do they connect to ok, which one do they have "problems" with?
You need to analyze client connections from the AP support info files, to see if
the APs have local interference (Athstats) or Clients have weak connections
(client status under WLAN interfaces). This will be more helpful than rebooting
APs or clients.
