Agreed, it does work with 7.1, we ran it too, however, you need to make sure that you include 2012 servers into your filters as by default they are not part of them all.
However, should you have an issue with a 2012 system, i will be hard getting support on that.
It will be worth the trouble upgrading to 7.5 SP1 with HF4 though, it's a quick upgrtade via SIM.
2012 fully sipported:
http://www.symantec.com/business/support/index?page=content&id=HOWTO9965