Okay, got another weird one. I have a workstation (mine, unfortunately), that's refusing to show the Admin Console on only one FMS 12 box. Says it requires Java 6 or later:
However, other boxes show normally:
Now this is where it gets really weird. Other users can see the first server page normally, launch the Console, etc. It's just my computer.
I've blown away the Java install, reinstalled it, cleared the cache, etc.