Couple of days back I wrote about how google shows one set of results during the day time and another set of results during the night time. Things have just got worst the results shown on the first page seem to change every few hours.
Internet users have lost the habit of bookmarking. (In case you joined the web after netscape lost it's market bookmarking means adding to favourites). Many people when they want to return to a particular site enter the query that they used to discover the site in the hope that the search engine will give them the same result set. Unfortunately that will no longer work because of google's recently aquired habit of sneezing every few hours.