3.5.7 is gonna be a reduced-scope release,
https://wiki.mozilla.org/WeeklyUpdates/2009-12-21#Branch_work:_Firefox_3.0.x_.2F_Firefox_3.5.x_.2F_Thunderbird_2.0.0.x,
and thus not taking any l10n updates.
I'm not totally fond of that, but with all the things flying these days
(Santa included), I didn't feel like raising that discussion.
Just to let you know why .7 doesn't have your opt-in-ed landings.
Axel