Reverse Match Frame - by all that is holy, WHEN?!?!?!

Probably when they can figure out how to gracefully match back through and to all the "container clips" that form a huge part of the FCP X design?

Shift F typically takes you to the next "reference clip level" (at the frame you're parked on in the Primary Storyline.)

Often a second Shift F takes you to the same frame in the source clip, but NOT if you've used a reference clip inside another reference clip - for example put a Sync Clip inside a Multicam.

I suspect it won't ever work precisely like a traditional Reverse Match Frame, because FCP X isn't structured like a traditional NLE. But I could be (and hope I am) wrong.

Ces't la vie.

Creator of XinTwo - http://www.xintwo.com
The shortest path to FCP X mastery.

[Bob Woodhead] "Meh, it's a database. How impossible could it be to park on a Browser clip frame and ask "is this a source to anything in the timeline, regardless of compound level"?"

Yeah, you're probably right.
They likely haven't implemented traditional match-back simply because they're just dickheads and figure its a cool way to "put one over" on professional editors.

Creator of XinTwo - http://www.xintwo.com
The shortest path to FCP X mastery.