Magento fix for IE9 issues

.htaccess

### IE users need a little help (Magento+IE9=bad times) ###
<IfModule mod_setenvif.c>
  <IfModule mod_headers.c>
    BrowserMatch MSIE ie
    Header set X-UA-Compatible "IE=EmulateIE8,chrome=1" env=ie
  </IfModule>
</IfModule>
<IfModule mod_headers.c>
# Because X-UA-Compatible isn't sent to non-IE (to save header bytes),
# We need to inform proxies that content changes based on UA
  Header append Vary User-Agent
# Cache control is set only if mod_headers is enabled, so that's unncessary to declare
</IfModule>