Here's the problem. I have a stack of 6 3750's in which one of them died. I have a spare on the shelf that I thought I would drop in and replace. The switch that died is a member and am replacing with the exact same model. The problem is the IOS is different. When the switch booted I get the lovely Version Mismatch .Luckily the switch that died hasn't caused an outage due to it just having failover nics plugged into it. So instead of upgrading the whole stack to the newer IOS, can I downgrade the replacement switch? We just had our maintenance window and if I can keep from having to schedule a special maintenance I would prefer that. I'm new to having switches in stacks so if you could provide any additional info or links I would appreciate it. Also, the IOS versions are 12.2(25)SEE3 on the stack and 12.2(30)SE5 on the replacement. Thanks for all the help.