Chad's right.
i like the copy paste thing... with a slight difference
what i've been doing is match framing the clips into the viewer, where they dont have any effects,
then cutting that back into the timeline on a new track just above the original.
then you know where they belong: they are in place.
this can get tricky if you've speeded clips up: the original might be way long.
if so, use multiple new tracks.
somehow if you have this clip in the timeline, the speed effected clip comes out right after Media Management.
and if it doesnt, then you can easily re-build from this "safety" copy.
cheers,
nick