This morning, I happened to catch the end of CTV's live coverage of the pope's general audience. It is customary for the Holy Father to receive visiting bishops and cardinals. Hot on the heels of a Maronite bishop was an Orthodox prelate. The only photo I could find is from the Catholic Press Photo web site.
Unidentified Ortodox greets Pope Benedict XVI as he leads his weekly general audience in Saint Peter's square at the Vatican. May 28, 2008
I think you are dead wrong on this one dear sister. If that is an Orthodox prelate (i.e. bishop or archibishop), as you allege, he would not be kissing the Pope's hand.
Chances are he could be an Orthodox priest, archpriest (monsignor in the Latin Church), or an abbot, in which case he would kiss any bishop's hand; or he may be a Melkite (i.e. Greek "Catholic") prelate, although I doubt it. In the Orthodox Church, the Bishops exchange the apostolic kiss, but they don't kiss each other's hands.
When Pope Benedict XVI visited the Patriarchy at Panar (Turkey), the first to greet him was a Orthodox priest who promptly kissed the Pope's right hand. Right behind him was an orthodox Bishop who embraced the Pope, as one Apostle would embrace another.
There is a similar photograph of the Ecumenical Patriarch and the late Greek prelate Chrstodoulos visiting the Vatican, and one can see a Catholic priest kissing the patriarch's right hand.
The clergy of both particular Churches are valid. Our non-communion does not invalidate the Holy Orders of the other side. They are 'real' bishops, and showing the same respect to Catholic clergy by the Orthodox laity and vice versa goes without saying.