make a cube go to right, front or top view, set to raytraced, select object → selection highlight is stretched.
the initial preview before rendering is stretched either by the same amount at the highlight i would say. best to observe on a more complex model which needs longer to initate, a cube is gone pretty fast.
also turning on Shade-highlight selected surfaces and polysurfaces does not show at all in raytraced
that bug are in there for quite a while, @nathanletwory do you know anything or could check? i am not sure if it is rendering related.
hm, sorry, that was my fault, i set the view scaling to 2:1.
BUT there still seems to be some bug in there, because when i set it to this the symptoms described do happen seen here on the image, but the actual image does not render 2:1 only the selection (and preview) get estranged sort of to 2:1. i think i meddled with this quite a long time ago, gave up and left it there, since renderings where always ok i did not think about it anymore.
for rendered it could be useful to create special projections (classic/historic) not sure what else it would be used for there, for the other modes like wire or shaded from what i have gathered (i dont personally use that) it is mostly used to stretch wonky control points, curves, surfaces for better continuity, fairing identification