Wow, really? Well, that 'thine' sounds awfully Protestant now doesn't it. "For the kingdom, the power, and the glory are yours, now and for ever." Now that sounds RC.
What think Anastasios is referencing is that in the Roman Missal the priest doesn't end the prayer with the "For thine is the Kingdom, etc..."
P: Let us pray with confidence to the Father, in the words our gave us:
A: Our Father, who art in heaven, hallowed be thy name; thy kingdom come; thy will be done on earth, as it is in heaven. Give us this day our daily bread; and forgive us our trespasses; as we forgive those who trespass, against us; and lead us not into temptation, but deliver us from evil.
P: Deliver us, Lord, from every evil, and grant us peace in our day. In your mercy in, keep us free from sin, and protect us from all anxiety, as we wait in joyful hope for coming of our Savior, Jesus Christ:
C: For the kingdom,the power, and the glory are yours, now and forever.
That is how the Our Father is done in the Roman Missal (current, normative mass).
Anastasios hits the nail on the head with his post.