I watched "The Eagle" a few days ago, and unfortunately I cannot say I share in the general enthusiasm. Going to see it at a movie theatre was not an option because all movies around where I live are dubbed, so I had to watch it online. I also wondered about the blurry scenes and thought it was just due to the bad quality of the movie file I selected but reading what Crispina wrote, I guess it was jut meant to be that way. It also took me a while to get used to it.
I don't know about the theatre version, but the one I found online didn't provide any subtitles during the long scenes in which the Seal People talk in their own language. It is very boring to watch when you don't really know what they are saying (ok, I could assume what was going on but still). Btw, I totally agree with ummidia quadratilla, they did look like Mohawk Indians! It often felt as if I was watching a Roman/Scottish version of "The Last of the Mohicans" and half expected Daniel Day-Lewis to make a sudden appearance and save the day.
All in all, not a bad film but not great either IMHO. I haven't read the novel but I'm pretty sure I'd enjoy it a lot more.