Transitions Between Clips on Different

In FCP 7 I often had an interview clip in the timeline and then I would add a photo or b-roll in the video track above the interview. I would then often add a fade or other transition to this b-roll and it would fade nicely from the interview to the b-roll and back, even though they were on different tracks. It appears that Final Cut Pro X no longer lets you do this. Has anyone found a work around? When I try all the various methods of adding a transition, none of them work. Is this another wonderful feature that has been removed in the "update"?

Kurtis