Hey guys. So this bug has been cropping up in a few cities in Skyrim, as well as in a few other areas. Here are some screenshots to help explain the problem:

http://cloud.steampowered.com/ugc/524905395735159409/E43C859506AF854825D65EDDB3ECBB413C88FAB8/
In this first screenshot, you see that all of Whiterun is explored. Notice the small Fog Of War spot where my cursor is. As soon as I move over and discover that spot, this happens:
http://cloud.steampowered.com/ugc/524905395735163287/7E712E2682264ACC16E7391E66BBF77CA3137856/

You can now see a perfect square in the middle of the town. Doesn't matter how many times I uncover the FOV, I can sometimes fast travel to and fro from it and it'll reappear, or just uncover it all again and it'll come up. I have a feeling this might be a memory allocation problem, but I'm not sure since I have plenty of ram (8 gigs) and 2 gigs of VRAM. I have colored map markers mod installed not sure if that effects this. Any help would be appreciated!

Also, side question: am I the only one where where I am at in Skyrim at any given point the map will take longer to load up? Look up at the sky or ground and the map loads up almost instantly. in some dungeons or big cities etc. It might take a full 1.5 to 2 seconds to load. Is that normal?

Nobody else?