I have been building static pages and have never got my adsense code flickering annoyingly. However when I start using Wordpress I got this annoying problem - only in Firefox. I went to see other wordpress blog sites and it appears that most bloggers just couldn't bother fixing it anymore. They just live with it. But for me it's annoying as hell! After trying some of the fix suggested all over the net, I found one that actually solve my problem. For those who got the same problem, I suggest you try this adsense flicker fix suggestion. The funny thing is, his adsense flickers! ha .. ha .. Just double check how it fare in IE. I need to put empty paragraphs after the codes in my index.php because it doesn't align properly in IE. Hope that helps some newbie wordpress bloggers (like me) out there