No I think it's revision 3 as well (although I'd have to double check to be sure), all revisions have (different) issues apparently. What I'm saying is that the I225 seems to be rather picky about what switches it plays nice with, so while it might work just fine with your specific setup, it might stop working fine when you change one variable (like the switch you're connecting to).

Also in addition to the issues the I225 has anyway, ASUS (and judging by some comments here other mainboard manufacturers as well) seems to have additional issues related to the power management of the built-in I225 adapter. From what I gathered dedicated PCIe cards with the I225 work much more reliably.