Most Popular Browser?

From Slashdot.com yesterday I learned that Microsoft IE is no longer king of the browser wars. Well - sort of.

Here is the chart showing FireFox 3.5 as the current most popular browser.

Not the beginning of the end. Certainly not the end for IE. In fact, if you total all the versions listed, IE still leads by a lot. But the trend is clear.

Does your site, service or software work on all current browsers?