Another weird bug at Google almost unknown. The language of the interface modify a lot the positionning of the results even of local declinaisons. (like google.ca, google.fr, etc).
Here a example with Google.com : http://www.google.com/search?&q=top%20challenge%20montreal%202007
My picture blog (vupar.blogspot.com) on this query got the 25e position.
But now, go to the preference and change the Interface Language to French :
Get back in the first page of results : Tadam ! Vupar.blogspot now showing in first place !
Soem countries like Switzerland or India have a lot of common language used there. Not very easy to know in which position a page are ?!?
Note: If you don't wan't to pass by the preference you can add &hl=en (english) or &hl=fr (french) at the end of the resulting URL