grep --include not working properly on rhel 6.4

Issue

We're experiencing strange behavior with grep that appears to be a known bug in 2.6.3, see

http://savannah.gnu.org/bugs/index.php?29876

grep --include is not behaving as expected but exactly as grep --exclude:

$ echo foo > 1; echo foo > 2
$ grep -H foo *
1:foo
2:foo
$ grep --exclude 1 -H foo *
2:foo
$ grep --include 1 -H foo *
2:foo