I’d updated 2 days ago and experienced the same Problem. My Blocklist is not that long (~120000 Entrys). I also have Problems with several URLs like e.g. de.wikipedia.org or the ntp.org servers. I just cant ping them and the systemlog contains a lot of resolve errors. I use the both google dns 8.8.8.8 8.8.4.4, which never caused Problems in the past.