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					Originally Posted by  upthesaukee
					 
				 
				New is not always good, especially with Microsoft.     
			
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 Correct.  Also, not all browsers support the same HTML features, some of them implement things slightly differently, and so forth.
A basic webpage should look and work the same in any standard browser, but as you start to get to more complex things (HTML5, video, audio, etc.) there is a higher chance that particular browsers have issues.
I've never been a big fan of IE, it's gotten a lot better over the years, but it's always been my last choice.