Most (all?) of the fetchers will now produce a BibTeX entry. When importing to a BibLaTeX database, this causes some issues, see e.g. #1015. It might make sense to add some mechanism to the search interface such that the correct format is returned. For example, this can be achieved by "search formatters", which will also remove some of the need of explicit cleanup code in the fetchers as well as some of the preference settings.