You can keep the subject line and drop-down menu if you change your LJ style. Trouble is I like my LJ style as it is. OTOH, incandescens also seems to use punquin elegant, and her comments pages remain (more or less) the same. The problem seems to be those of us who kept Xcolibur, the useful Xcolibur with its nice blue strip at the top. Posting from Xcolibur is as it ever was; commenting from Xcolibur limits one's options completely.
Somewhere in the bowels of those drop-down menues is a way to stop using Xcolibur: but I don't want to do that either.
Later: found it. And no, changing to vertical or whatever doesn't give me back my subject lines. Puzzley puzzle. Oh-- and if you unclick Xcolibur, the option vanishes. Argity argh.