Facebook Birthdays not showing in google calendar anymore

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http://forum.xda-developers.com – I exported facebook birthdays to Google Calendar a while back. Since I dropped HTC Sense (which has its own facebook sync built in) I've been using this method to sync facebook contacts' birthdays to my android device(s) and never had problems. But suddenly, I don't know since when exactly, "Friends' Birthdays" are no longer shown in Google Calendar. So I can't see them nor in the desktop version of Google Calendar nor on my mobile devices. Well, I can see one: my own birthday :confused: Is Facebook's timeline interfering? Anyone else with this problem? (HowTos)