Came back from vacation to find HBO no longer was working on my 4 Tivo's. Apparently Fios had to honor a new HBO encryption protocol that went into effect August 1st that will make it difficult to move their content between devices. Called customer support and all they could re-authorize was my Premiere Elite and ordered me new cable cards for the rest. Today new cards came and still could not authorize HBO on my Premiere XL, TiVo HD and Series 3 units. Btw all other pay services like Showtime avtivated just fine. After almost 3 hours on the phone with the CSR trying to activate them in their "normal" way he was told to try an activate them in a "card swap" activation mode. This worked for the XL and the TiVo HD but not the Series 3. He was trying to tell me it was incompatible with the new encryption, exhausted I gave the fight up on the Series 3 for now since my 3 main tv's were now working. Was hoping this may save some others some grief. Funny thing is they are saying I am the only one they have seen with this problem......isn't this what they always tell their customers.