Yes the same has happened to me, but I've noticed I go to several different specific news sites instead of Reddit and Digg now. There was a recent post about a slinkset site I think it was called Infosec Update or something that seemed promising. I use a lot of Pligg sites as well now.

Digg is, well, Digg with all it's failings. Reddit recently turned into 4chan. HN I like as the SNR is quite low but I have started to see posts for things that are less related appearing as the community grows. I've also spotted the same sites popping up again and again.