Animal Crossing: City Folk - Checkerboard Grid Drawn Across Sky

[Elevory]

Hi, folks. I started playing Animal Crossing: City Folk using the latest 64-bit version of the Dolphin emulator. My machine is quite powerful, so I'm confident that the issue I'm about to describe below is not the result of lacking hardware. Moving on:

This is how my sky looks in-game:
http://i.imgur.com/FqlPS.jpg

EDIT - Here it is at night:
http://imgur.com/OCMmy

I'm experiencing this problem regardless of the hour. To make matters a little worse, I don't think I can see the stars at night, which I imagine is a related issue. < Scratch that, I do have stars.

Truly, these are the only hiccups I've encountered during my emulation of the game. I'd be very grateful if someone could help me tweak my settings such as to minimize or remove the presence of this "checkerboard" pattern.

Here are the relevant configuration windows:
http://ace.mpql.net/screenshots/2012-06-18_16-57-17.png
http://ace.mpql.net/screenshots/2012-06-18_16-57-49.png (I've tried other aliasing and anisotropic-filtering configurations, doesn't seem to affect anything)
http://ace.mpql.net/screenshots/2012-06-18_16-58-06.png
http://ace.mpql.net/screenshots/2012-06-18_16-58-20.png

Let me know if I should post other windows containing helpful information. Thanks in advance!

[Elevory]

Turns out I do have stars, so I updated the first post with a nighttime screenshot and modified the thread title.