I had some problems with translating some texts to Hungarian. Blog entries and pages were ok, but trying to translate info texts and menu items resulted in an error message:
Query failed: ERROR: relation "localizertranslation_tid_seq" does not exist.
The solution was quite straightforward:
CREATE SEQUENCE localizertranslation_tid_seq;
ALTER TABLE localizertranslation_tid_seq OWNER TO drupaluser;