ohno - 1:37 pm on Oct 22, 2012 (gmt 0)
If you use statcounter it tells you in what positions the clickee found you at.
Got something similar and makes it even more puzzling, according to that info we DO rank really well. So how can one day be so different to the next? Edited to add, although that tells us what position WE are at it doesn't tell us who else was on the SERPs page for the search term. I think that is the important bit........(hence Google blocking the search terms).