This has been going on for I think a couple weeks now. I first noticed it when I got about 300 Angry Birds Space walkthroughs in my RSS reader in a 3-day period.
It seems I will get the same articles maybe 3-5 times in a row every couple hours. It's kind of annoying, plus it's an extra strain on my phone's battery. I'm using Google Reader and am subscribing to the PC feed.