I hung drywall horizontally in my bedroom and hired a company to mud and tape it so that I could prime and paint. As you know, drywall sheets are recessed along the edges in order to hold drywall compound. Well, they did not mud along the bottoms of any of the walls where the drywall sheets recess. Shouldn't they have even so much as applied a sloppy layer of mud to fill the recess so that my base moulding would have something flat to be attached to? Otherwise, when I go to put on the base moulding, it's going to dip inward.
Here's a picture of a corner in my room where the bottoms are entirely unfinished. It seems like the bevelled edges along the bottoms of these sheets should have been filled in to provide a flat, vertically level surface to hold moulding.