Inspired by a conversation over on the Google Group, I finally wrote up the results of some testing that I've done on the interplay between wall thickness and nozzle width settings in the current (Skeinforge-powered) version of Cura. Basically, if the wall thickness isn't an exact multiple of the nozzle width, some weird things are going to happen, because the extrusion rate and the spacing of the extrusion paths will no longer agree. Depending on the settings, this could lead to under- or ove