Minor correction: the "bug" in grep was fixed in GNU grep 2.7, not 2.6. I recall that because I wrote an article about it on my blog. See the release notes for

Minor correction: the "bug" in grep was fixed in GNU grep 2.7, not 2.6. I recall that because I wrote an article about it on my blog. See the release notes for GNU grep 2.7 here: http://savannah.gnu.org/forum/forum.php?forum_id=6521 http://savannah.gnu.org/forum/forum.php?forum_id=6521