Yup, noticed this as well. The theme was slightly different this time. I hadn't noticed ay change until the 'Hand of God' episode (U.S. version). In fact, I know there hasn't been any change until now for the U.S., at least in Oregon, where I live. I have recorded every ep. Changes noticed: Lighter on the woodwind melody, melody itself is different and more subdued, voice before percussion section seems quieter, and the percussion section rythm is slightly different, with a less definite ending. Seems like the ending doesn't meet with the ending graphic (the military logo), like it wasn't synced. I don't like it. What's up with this?
Oh, and I haven't heard the U.K. theme. I'll check it out. So does this mean we have 3 or 4 versions of the theme out there? The original U.S., the original U.K., a new U.S (starting with the Hand of God ep), and a new U.K. version without the lyrics? I'm confused.