Hello Here is an interesting information for firefox users. If you have firefox and can' t login to your adsense account, here is the problem: http://www.webpronews.com/topnews/2007/07/23/firefox-causes-adsense-woes The solution is to update to the last firefox version, released to adress this issue
The solution is wrong. Upgrading wont help. Adsense blog posted the solution today read it on their blog. The solution is to disable "Adblock Plus". source: