Look at this:
[
attachment=9813]
IMHO should be 2 another tables, for "size" and "name".
Test board: MyBB 1.4b2
Thank you for your bug report.
This bug has been fixed in our internal code repository. Please note that the problem will not be fixed here until these forums are updated.
In addition: "Attachment" -> untranslatable string.
[
attachment=9824]
On screen is fragment of polish translation.
You can translate it just fine. It's right there in the $l['size_attachments'] string
