[development] problems with db_rewrite_sql()

Hi, I'm trying to implement db_rewrite_sql() on all sql queries that list nodes in the faq module so as to support i18n localization. However, I've run into difficulty getting it to work in a settings form. The same code in a different function works fine, so I'm unsure why the sql isn't getting rewritten in this case. I created an issue about it (#138624) a few weeks ago but it hasn't gotten any replies. At this stage, this is the only issue preventing me from doing a new release of the faq module. So if anyone has encountered this before or knows what I may be doing wrong, please let me know! Cheers, Stella