Acid test is a test to identify problems web browsers have when rendering web pages.
There are 3 versions Acid Test 1, 2 and 3.

Acid2 should look like this:

But here is how Acid Test 2 works on my different browsers:

Google Chrome:

Firefox:

Opera:

Safari:

Retarded Internet Explorer 7:

!!!

Now, none of my browsers passed Acid Test 3!!!
It should look like this:

Google Chrome:

Firefox:

Opera:

Safari:

Retarded Internet Explorer 7:

Of all the browsers, all perform almost the same but only Internet Explorer is way off, I don’t know what the developer team who is in charge of Internet Explorer does at Microsoft every day. I’d say all of them deserve to be fired!!!

Of all the other browsers, I think Apple Webkit rendering engine is the best (Google Chrome and Apple Safari) which I think is another reason for Google to use it in their browser Chrome.

Apple Webkit is a state of the art and open source HTML rendering engine developed and released by Apple.

Here are the links to these tests:
Acid2
Acid3