[otrs] FAQ search does not return anything

Hi, I'm trying to have FAQ work on our system. Creating, editing, deleting articles is ok, but the search function does not return any result. I have only the Welcome article that is present at OTRS install. Doing a blank search (no fulltext, keywords, category or language selected) gives nothing, while it gives result on the online demo system. non-blank searches do not work any better. I have updated Kernel/Modules/FAQ*, Kernel/Output/HTML/FAQ.pm and Kernel/Output/HTML/Standard/FAQ* from cvs, but it did not help. I could not spot anything in the documentation about the FAQ system, I might have missed it, so any help or pointer would be appreciated. Brice