why is IE9 ignoring my CSS?

these questions getting redundant know, 1 big 1 50% of user use ie8 or 9 cant forget it

 

http://creationsmh.com/

 

when viewed in other browser such other browser ( chrome, safari, opera, firefox,) works looks , works should ( few excenptions) when open website ie9 works rather horibbly have come find out, irgnoring 90% of css of corse not of it. few buttons have transparency , bg image there other 90% dosnt exist stumping me have picked through code on , on check if there missing dont know else please help?!

older browsers not recognise html5 tags, , have no reset tell them tags mean. such, thrown on place.

 

look @ html5 shiv: http://code.google.com/p/html5shiv/

 

or start , modify suit needs: http://html5boilerplate.com/

 

eg, include:

article, aside, details, figcaption, figure, footer, header, hgroup, nav, section {display:block;}

 

edit:// having looked @ in ie9, thing seems incorrect blue line around images in nav. add solve that: img {border:none; display:block;}

 

the real problem ie8 shows on place - html5 shiv comes in.

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