What is wrong with people these days? They just don’t seem to grasp the concept of validation! It’s extremely import and people just seem to forgot about it! Not only does it make your code error free, you have a greater chance of things to disply correctly in more browsers. Granted, it will not fix all problems, but it’s a very good place to start when you encounter problems with your design.
I’ve heard the old song and dance, “Well why do I have to validate, such-and-such web site doesn’t.” That is a totaly stupid question, just because some big web site doesn’t validate their code doen’t mean you have to. That’s not only illogical, but down right dumb. If I jump off a cliff you gonna follow? I bet you’d say no, so what’s different in this case? Absolutely nothing! Web sites that don’t follow the standards are example of what not to do, not what to do. They set an extremely bad example for you and me.
For your reference:
HTML & XHTML Validator
CSS Validator
Just remember to validate or else I might just hunt you down! 
October 15th, 2006 at 2:46 am
I agree completely
Having valid code is not only pretty, but keeps everything running smoothly too. My site’s completely valid - the only part that isn’t valid is pages within the iframes.
October 15th, 2006 at 2:15 pm
Belloman has seen the light! Yay!
October 15th, 2006 at 4:45 pm
I don’t usually validate, but I did for my band’s new layout.
And I probably will on others too. Just cuz it gets me used to it.
December 15th, 2006 at 7:16 pm
We all gotta start somewhere.
May 17th, 2008 at 6:10 pm
Yeah !!!
I totally agree !
And code validating means also that you’ve done good and correct job. I would never pay someone to do my website with a incorrect xHTML code.
Maybe I won’t pay anyone to do it because I’m able myself :p
And as you said, it allows to display as you really wanted the pages (and trust me, in CSS, it changes everything =D )