<<Microsoft estimates that Google gets 7 cents in ad revenue for every search, while Yahoo gets 4.3 cents and Microsoft gets 3.9 cents, according to a PowerPoint slide Microsoft mistakenly posted online.>>

http://www.google.com/hostednews/ap/article/ALeqM5ix-XWTSGJLpyQX6v9KQPCOjrHX1gD99SCAN00

Good pick!

but I thought it used to get more... (there are articles about that on some unofficial google blogs)

Ads related,
http://www.searchenginejournal.com/google-sponsored-ads-get-closer-to-organic-results-in-serps/12354/

Comparison Chrome / IE8
http://www.websonic.nl/nieuws/082009/images/ads_zoekresultaten_b.jpg

Ads change depending on many things... I doubt the browser had an influence

Woops, I thought you were pointing out the amount of ads, not the placement.

Ah ok :-). I don't like the placement of the ads, there to close to the results, like in the screenshot.

You see, on my mac, I always have the windows "Zoomed to fit" so nothing changed for me except that there is now a line in between :D

Internet Explorer 8 now shows the ads also to the left, so FF, Chrome and IE are the same now.