My basic sidewalk no longer allows attachment at all four corners, it only allows attachment at the lower right and left hand corners. This is after building several assemblies with SP1A that had attachment points (circles) at all four corners.
Is anyone else having the same problem? Oh, and my urban sidewalk refuses to work if I assign a 0% slope to it. Wonderful!
Take a look... top created with SP3 - bottom created with SP1A