I’ve posted before that Netview uses the version of Internet Explorer installed on your system. It turns out that, as of IE8, it’s not quite that simple. Thanks to Luc-Eric for pointing this out.
To force Netview to use IE9 mode, you can either set a registry entry
HKEY_LOCAL_MACHINE (or HKEY_CURRENT_USER) SOFTWARE Microsoft Internet Explorer Main FeatureControl FEATURE_BROWSER_EMULATION xsi.exe = (DWORD) 000090000
or add this meta tag to your HTML page:
<meta http-equiv="X-UA-Compatible" content="IE=9" >
Also, after setting the registry entry, Netview scored 140 at http://html5test.com/ (before I set the registry, Netview scored 40). Note that IE9 itself scores 141.