For the last 6 or 7 months I've had a very reliable strategy for ranking sites. Nothing that complicated - just targeting fairly low competition keywords and using article submission with AMR for backlinks. It's been working like a charm up until the last couple of weeks. Now it just doesn't seem to be working at all. I don't profess to be an expert with SEO at all but I do have a pretty good understanding of what's needed for it to work. I can only guess that it's maybe the latest panda update that's causing this as nothing I'm doing on my end is different. Any thoughts/suggestions would be very welcome..