I'm with Redflea, though it shows up for me(2% at 4 min) it's a non issue. There must have been an anomaly during your install. Or it might just be an app running in the background that was using it.
Too bad there's no way to figure out WHAT app was using it! It was up at the top at like 70% or something absurd after only a few minutes, and I tried playing videos in every player and thing I had, but it would just skip and fail because something else was using it up, and Android doesn't seem to have a better way of reporting what's using the Media Server.
1.7 is great though, so I may just hold out for the next update and leave 1.71 alone.