http://build.webkit.org/results/Lion%20Debug%20(Tests)/r112674%20(5107)/results.html
Also http/tests/cookies/simple-cookies-max-age.html
This link is dead now, and the tests are not failing for me locally, except for some flakiness in all the cookie tests, not just these two (<rdar://problem/11571450>). I guess I should just re-enable them and see what happens.
Unskipped in <http://trac.webkit.org/changeset/119286>.