"ls -x" or "ls --format=across" produces a garbled listing.

To reproduce, create a directory with the files a_file, b_file, ... i_file.

ls produces:

a_file  b_file  c_file  d_file  e_file  f_file  g_file  h_file  i_file

ls -x produces:

e_file  b_file  c_file  d_file  e_file  f_file  g_file  h_file  i_file

Notice that a_file is missing and e_file appears twice. This problem was not in
FC6 and is brand new with F7.