Interestingly, on encountering this problem as the post owner did, I did some reserach on the man page of it and as a reward I found something like "For details on the format of these files, run 'dircolors --print-database'."
When I execute "dircolors --print-database|less", I found this:
STICKY_OTHER_WRITABLE 30;42 # dir that is sticky and other-writable (+t,o+w)
OTHER_WRITABLE 34;42 # dir that is other-writable (o+w) and not sticky
STICKY 37;44 # dir with the sticky bit set (+t) and not other-writable
# This is for files with execute permission:
So everything is clear now!