These files won't be in your existing mozillamessaging.com repository, you'll need to check out part of the mozilla.org repository, where the new Thunderbird site is being stored. All localizers have been granted access. You can:
svn co svn+ssh://svn.mozilla.org/projects/mozilla.org/branches/staging/thunderbird/
Please translate the 2 files in the mozilla.org svn repository for Thunderbird 5 in-product pages, that is:
You can also attach your translations as a zip archive to this bug or as individual text files and Milos or I will then commit them for you.
The pages on the staging server are:
Mass-moving Thunderbird-specific bugs to the new www.mozilla.org/thunderbird component.
If you believe that this particular bug was moved in error, feel free to move it back to the www.mozilla.org component.
Filter bugmail on 'sancyouverymuch'.
Ugh, forgot to reset the QA contact.
Continue to filter bugmail with 'sancyouverymuch'.
Closing old Thunderbird L10n website bugs that are no longer relevant -> wontfix.