Catherine,
first of all, seems you are using KM 1.5.x that is outdated now though it remains last official stable version.
But as offen happens in open-source, actual usable version is next beta - 1.6b2. Moreover, the most modern are, so to say, "community remixes" - builds, created by some members as mix of stable, beta versions and new components from Mozilla.
I've just
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