I first recommend getting the Firebug extension if you don't already have it! (Turn on the "break on all errors" option).
Reading the js code, you see the following flow:
For me, b is null. I have cookies disabled by default, so this is most likely why in my case. I am not sure if this applies for you.
I'm trying to add AdSense ads to Ottawa Forums, a forum I manage. They work fine in IE (talk about surprising), but in Firefox, I get this JavaScript error:
Source File: http://pagead2.googlesyndication.com/pagead/show_ads.js
Line: 2
I've Googled it, but I haven't really come up with anything. Does anyone know why this might be happening and what I can do about it?
--- Mr. DOS
P.S. The Google ads are supposed to show up in the top-right corner of the page, opposite the forum logo. If you see an ad for a company called "HitPC" instead, refresh the page - I've got it set up so there's a 50/50 chance of getting either the Google ad or the HitPC ad.