I have everything maxed in-game. This isn't an isolated case either.
Slate Fields 3.

Digital Designer now.

Digital Designer back in 2009 when I ported the map and took the screenshot for the preview image.

Edit: But then something like The Slopes, the textures look fine.

Perhaps it is a problem with my maps after all. All of the screenies posted, except Slopes, are from my maps. Odd. =/