I've been giving some thought to this, understand that I am a software tester and primarily one that works with memory related issues (just not on video games). But the fact that you can go into any dungeon you've visited and see the body of a creature you killed a year ago (in game) is already a huge problem. Add that to the fact that any arrow dropped, any piece of weapon on the ground, as well as any items moved/taken and each dungeon represents a LOT of information. We're not just talking about where the body fell, we're talking about the position its arms and legs were in. We're talking the type of dagger and what direction it is facing on an x,y,z grid (width height depth).

Now, 20 hours into the game and you've visited quite a few dungeons. The thing is, the outside world seems to refresh properly, so resting and rebooting the system does get rid of some cached data. But the dungeons are still there and the longer that information exists the less time a reboot will help.

I asked this before but I've got to say that this is a major issue for computing. Does it happen the same way on PC and 360's? If so, does their typical setup enable them to handle these bits of information existing better? Keep track of this, because running a machine for such a long time at such a high-stress level may end up damaging the machine. It may be interesting to see how many people have their ps3's die with skyrim in it. That being said, I think this may be the best game I've ever seen. Can't wait for a patch.