Modernizr, html5shiv, ie7.js, and CSS3 Pie. Which to use and when?

Question

I\'m just starting to use HTML5 and CSS3 in my documents. I understand the need for JavaScript to bring Internet Explorer up to speed with these new tags and styles, but I

Answer 1

I've used mainly CSS3Pie...it works great. But this afternoon i tested it on my laptop with I.E8 and there was an problem with it...it was disabling some css lines...when i removed the css3pie code my site gained twice the speed...then i came accross the posts with people arguing about the css3 slowdown...So at the moment i'm busy to find another way for IE7 & IE8 to have border-radius and shades.

If you want to use it...please test alot as it is NON-official fixes