From 3 down to about 9 or 10 for main kw and onto page two for the other. Have held good positions for the last 18 months or so. Domain is 6 years+ KW's are Mod to difficult (according to the adwords kw tool) Is it fair to assume this is the panda/penguin effect or just general logarithm changes? May be a bit of a wake up call as I haven't down much link building for the last few Months and have just chucked up a couple of long articles. Noticed all the other long term sites around me are 'altering position' as well. Perversely I threw a site together on an old domain put a bit of unique content on it a few weeks ago and it is ranking alongside my main on some of the Kw. Never built any links to done any off page SEO for it other than to originally get it indexed.