It seems as if when your UV's image ratio is changed from 1:1 into 1:2 or 2:1, the snaps and rotation become broken. Snapping verts will spaz-out and rotating elements will skew to undesired shapes. Is the polycount community aware of a solution to these issues? I'm also curious if 3ds Max still has this problem, as I've…
malcolm: No, Max's UV editor is much nicer for non-square textures. It stretches the UV square and while you're still mapping in a 0-1 range, it correctly compensates for the "squash" when you rotate, so if you rotate something 90 degrees it actually preserves the aspect ratio instead of stretching it like crazy. This…