147: Why does Gnus put the subjects in replies beyond the 80th column?

  This is a feature.  If you set gnus-thread-hide-subject to non-nil, Gnus
  will only display the subject of the first posting in a thread, even if
  some of the replies use different subjects.  It hides the subjects by
  putting them past the edge of the window and setting truncate lines to t.

  If your screen looks messed up, then for some reason truncate-lines in
  your "*Subject*" buffer has been set to nil.  It should be set to t.