Identical UTC dates don't always match in Rails tests?

Here's an odd one. Check out the results of this test:

1) Failure:
test_update_existing_asset(WsControllerTest) [/Users/chbailey/Code/Stingray/test/functional/ws_controller_test.rb:146]:
<Thu Jun 08 05:11:36 UTC 2006> expected but was
<Thu Jun 08 05:11:36 UTC 2006>.

1 tests, 11 assertions, 1 failures, 0 errors

So, uh, how are those time stamps not equal?!

Tags: rails, testing