It seems like it has something to do with lower detail settings. Ever since the update my vehicles have looked slightly off, with a few maps (notably Raiding Party) having their level of detail go down by a significant amount.
I run AW on a mid-low end laptop that doesn't have much in the way of additional RAM or GPU for higher graphics settings, so I usually just go for the lowest possible settings to try and max out my framerate while maintaining screen resolution.