Comment 2 for bug 557653

Launchpad will only consider newly translated strings as coming from Last-Translator as indicated in the PO file. The skew in the numbers probably comes from obsolete messages (they are translated as well, even though they are removed from the template: if they are ever re-introduced, they'll again be used).

I've tried checking one of messages that is both in previous and new PO file, and it's correctly attributed to someone else: https://translations.launchpad.net/ubuntu-manual/lucid-e1/+pots/ubuntu-manual/cs/112/+translate

I guess the only thing that's confusing is the number of translations, and we should fix that.