I have three WiSM's in my environment currently running just over 400 access points. They are running 184.108.40.206 currently, but we are getting ready to upgrade everything during a scheduled downtime. I was wondering if anyone else has upgraded to 4.1 and what issues if any have you experienced? Being that we are a hospital, I can't afford any unscheduled downtimes or issues, but I want to get as high as possible in the code so that I don't have to upgrade again in 6 months. Any thoughts would be appreciated.