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Forum Moderators: goodroi
[edited by: goodroi at 5:03 pm (utc) on June 19, 2009]
[edit reason] Please no personal urls [/edit]
This sounds like Google personalized search results and not a browser issue. Google tracks users that are logged in and tracks users that are not logged in but whose browsers have accepted a cookie from google. Based on your previous behavior on Google.com (searches & clicks) Google will adjust the rankings.
I would guess that you are logged in on one browser and seeing personalized search results and not logged in with the other browser thus seeing non-personalized search results. Even if you are not logged in your search results may be adjusted based on your previous activity on Google.com.
There are a few other possibilities to explain for what you are seeing. It is also possible that you encountered Google running one of their many short-term tests. Another possibility is that it is a cache issue. There are a few other rare issues but I don't want to mention them since they are rare and would probably just confuse the whole situation.