Recently I discovered that I could not view the blogs.codegear.com website on my new (very fresh) Vista computer. It was not IE related because also in FireFox the website was not shown. After setting virusscanner, firewalls, parental control(?) on and off it still did not work. (Bummer :-$ )
Finally I asked in the delphi.non-tech newsgroup, and guess what? As always it was fortunately not just me, but a common encountered problem. :-)
Thanks to Roddy Pratt I finally found the solution, which also comes in play by registring Delphi 7 and Delphi 2006. You can find the solution on the Borland support site.
I don't know what the exact problem is but it looks like a TCP/IP problem between Vista and the CodeGear server. It is very strange that some Vista installs do not have this problem. More information on this issue through Google.
By the way, just found out about this new dutch Delphi for PHP forum http://www.delphiforphpforum.nl/ (in dutch)