Post Revisions Inconsistent Times: Post and Revision Pages

Hey All,

We’re experiencing some inconsistencies in the revision timestamps. On the post page we get one set of times, but if we click to see the details of one revision we get another.

Half of the timestamps are wrong on the post page: http://screencast.com/t/njXeHJaR

And different on the revision compare page: http://screencast.com/t/cYfdkvtqu

Any ideas what may be happening?