Yes, I tried it.  For the record, this is what is produced for the
different runs:

cer...@xango:/usr/src/buildd/coreutils/src$ ls --color=auto|tail -1 | od -Xc
0000000        2e736579        00000a6f
          y   e   s   .   o  \n
0000006
cer...@xango:/usr/src/buildd/coreutils/src$ ls --color=always|tail -2 | od -Xc
0000000        2e736579        5b1b0a6f        0000006d
          y   e   s   .   o  \n 033   [   m
0000011
cer...@xango:/usr/src/buildd/coreutils/src$ ls --color|tail -2 | od -Xc
0000000        2e736579        5b1b0a6f        0000006d
          y   e   s   .   o  \n 033   [   m
0000011
cer...@xango:/usr/src/buildd/coreutils/src$ ls --color=auto|tail -2 | od -Xc
0000000        2e736579        65790a63        0a6f2e73
          y   e   s   .   c  \n   y   e   s   .   o  \n
0000014
cer...@xango:/usr/src/buildd/coreutils/src$ 


Also, when I run 'ls --color|less -FXR' all I see is an additional (looking 
empty) last line. By the way, 'ls --color' is identical with 'ls 
--color=always'. The --color parameter defaults to 'always'.

So, what do you mean as "confusing less -FXR"?

-- 
ls --color=always outputs possibly-extraneous ESC [ m on separate line, 
confusing less -FXR
https://bugs.launchpad.net/bugs/494663
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