I followed the instructions verbatim and purchased the Freeblood SC race pack. When I go into character creation, I can see the Freeblood class, but cannot select it to make a toon as a Freeblood. It doesn't highlight to advance to the next screen. When I launch EQ2 normally, using their unpatched executable, I can make a toon or do a race change to Freeblood. I can then switch back to using the 12-13-10 patched executable and play the class, see the other race pack items as well as see other Freebloods.
So far, the only problem I noticed is with the character creation (which you can work around as described above). I am not sure if this is consistent with others or not.