Actually what I’m seeing is that custom field values are being tracked, but only when comparing the most recent revision to the next previous revision. If I go back in time further, that’s when I don’t see any revision comparisons for custom fields.
I am using a custom post type… but I’m sure it does support revisions because everything worked fine in WordPress 3.5, and I do see all revisions for the title field. A revision point only gets saved when I make a change to the title. Otherwise if I just change a custom field, a revision point is not saved.
