Codeplex, IE, and Firefox

Ok, maybe my system was completely screwed up and that's why it didn't work. But to the best of my knowledge I have a Vista Ultimate installation including IE 7 maintained by Microsoft Update. It has the latest and greatest patches installed. Today I went to codeplex.com - Microsoft's answer/contribution to the open-source community - and tried to download a few Sandcastle bits. I used Internet Explorer for it since I thought "It's a Microsoft site so the Microsoft browser should be fine." Well, it wasn't. When I clicked one of the two download links for Sandcastle I was presented with an overlay window (no pop-up) containing some licensing information. Before I was able to click the "Accept" buttone the overlay disappeared, and .... nothing happened. I restarted IE, and tried multiple times, eventually I got fast enough that I could actuall click the "Accept" button. Still it didn't work. Despite my recent experience with a different Microsoft Site that serves IE only, I thought it is at least worth a try to use Firefox. From there it was a breeze. Everything was straight forward, working flawlessly. Which leaves me wondering whether the guys who maintain the Codeplex site test mainly on Firefox.... (Onto my soap box: Microsoft - in my opinion - has started to move in the right direction. At the same time I believe it has still a long way to go until it competes on merits and great products and services only.)