Here’s an odd one… Norton Internet Security 2006 for some reason thinks that the iTunes download page on the Apple site is an ad. Consequently, if you have the ad blocking running under their AntiSpam section, you won’t see the big blue button that allows you to download the software.

Solution, turn off ad blocking temporarily. I’ve seen this happen on a couple of other sites as well. So if a page doesn’t form as expected, try turning off ad blocking temporarily – that might be your fix.