It depends on the update . . . I'm currently hosting a series of meetings where we are certifying all of our existing IE 6 and IE 7 based applications for IE 8

It depends on the update . . . I'm currently hosting a series of meetings where we are certifying all of our existing IE 6 and IE 7 based applications for IE 8. Much is broken because of hacks necessary to make these sites work properly in older versions of the browser. While I'll be the first to say that we apply the IE Cumulative Updates the day after release ... silently ... to every PC in our company, we wouldn't dream of deploying a major browser update without reviewing it. Anymore, 99% most of our applications are browser based. A major browser update (Firefox 2.0 -> 3.0 or IE x.0 to IE x+1.0) can be as impacting as upgrading the operating system silently. Yes, yes, I know. We standardized on IE, bad us. It wasn't my call :o).