Hmmm...let's wait for F$ or one of the MW gurus to chime in here, but if I remember right, the validation inconclusive statement just means it's waiting for another cruncher to crunch that same WU, and then the server will compare the two results for validation.
In other words, it's not an error...yet. Unless it comes back with a different result than what your rig gave.
Someone please correct me if I'm mis-remembering here.