[slommer]

I was just thinking the same (also openelec 5.0.0). But watched 2 eps on "Dec 29, 2014" with opelec 5 which are in trakt.
Found this in de kodi.log for the eps yesterday:
T:2907493440 NOTICE: [trakt] [traktAPI] traktRequest(): (4) Server Busy ({"status":"failure","error":"Trakt.tv is down for some major site and database updates. We'll be back on Monday morning (PST). Thanks for your patience, it will be worth it "})

So temporary down of the database for the upgrade