The report applies not only to 2.3 but to the dev builds available for past 3 days as well.
Path-based metas apparently do not get rendered into the final code, on a bilingual D7.12 site.
Ticked: copyright, description, keywords.
Default fields (meta_keywords, etc...) + custom one "field_author" (named as instructed, but this one does not appear as checkbox for ticking, why?), all not hidden, tested with various formatters.
The paths follow the pattern
en/* to enable global metas per language. Paths suggested to admin by clicking the secondary tab do not work as well.
Tried to enter
* alone as a path (without leading lang code), but this is not allowed (why?).
Auto settings: Global keywords do not render as well, no edit field to enter default keywords.
Isn't it a total mess-up and disaster on that little setup? :)