I have 2 PIXs in Failover running 6.1(3). I am going to upgrade to 6.2(1). I would like to upgrade them remotely but the way I have done it previously is to turn one off as the newer version one comes online. Are there any problems with leaving 2 different versions running for a couple of mins while I telnet to the other box and TFTP the new code to it. I know its not supported but I dont really want to come into work at 1am to do the upgrade.