I am no longer certain. :) We are told that first it must be filtered through the Gospels, and with any apparent discrepancies, the solution is to toss the OT passage. Next it must go through the lens of the Church for further modification to ensure that the none of the dogma of the Magisterium is offended. I'm not really sure what is left at the other end that would look like the text. :)
Christ and His ministry in the Gospels is God's full revelation to man, FK. To recognize and accept this is to become a Christian. Everything is then seen through His eyes and words. The Jews did not receive full revelation until Christ, and all that was written was leading, foreshadowing His coming. As such it cannot be used on the save level.
But we have been through this. I could just as easily say to the snide remark about Orthodox not having any OT that I wonder how much Christianity is left in Protestants, since they put so much emphasis on the OT and Paul. Clearly such remarks are not made to further any discussion, which seems pointless anyway, but to insult.