Strange, Low-res Minmus Textures

[bgraves]

KSP: 0.90 Windows 32bit

Problem: After getting close enough to Minmus, the texture changes to a low-res version, and doesn't change to a higher-res version even once on the surface, leading to weird, splotchy ground. Images here.

Mods installed:

Reproduction steps:

1. Get close to Minmus.

2. Marvel at badness.

3. Post a support request on the forums.

Changing graphical settings, or restarting the game, does not work. The issue doesn't seem to occur on Mun or Kerbin.