Yeah, that's how mine is set. The strange thing is, sometimes it caches, sometimes it doesn't...in the same session. For example, I can open an image in the gallery and it will cache. I go to open another one and this time the nav bar reloads. It appears random, although I haven't studied it to see if there's a pattern. More often than not though, I seem to be waiting for that bar to fill in all the way.