Change rMWb747307a2002: WLFilters: Live update and View newest caused bookmarked watchlist links with a "days=0" URL parameter to interpret that as meaning 0 days rather than "all available days" as it previously did. That's an annoying breaking change, but easy enough to work around.
What caused me to waste a half hour this morning was the fact that rMWb747307a2002: WLFilters: Live update and View newest did not update SpecialWatchlist.php lines 611-615 to match, so the screen still says "Below are the last 0 changes in the last 720 hours, as of 27 September 2017, 11:48" despite it actually covering 0 hours.