As you may notice, the website has changed. The material is still the same and it works in a similar way. There's also a new feature on the site, similar to the old one, which gives you suggestions about content similar to the one you are currently viewing - this time with images. The website is likely to be tuned for a while, and of course it will get new material continually.
Older browsers are not fully supported, sorry - this includes IE7 which is now 2 main steps older than the current version. If you are using a lot older browser, you really should update it. In addition to site functionality, you'll get new features, improved speed and more security; using old browsers with security holes endangers your company and your personal information, making you more suspectible for identity theft.