I have changed the threshold for the fiber polarization notification on DIAG_MAIN from 20% to 25%.  We still aren't sure why we can't get the ALS_X polarization below 20% (I don't think anyone has taken the time to check that no PD calibrations got lost in some reboot, or something like that), but the flashing on/off of the notification on the front wall is obnoxious, since everyone in every GW IFO control room is unhappy when there are flashes (since out of the corner of one's eye they look like a potential lockloss).