This theme has been devloped to provide a basis for a single theme across a wide variety of screen sizes, from full desktop down to mobile phone, although the prime focus is intended to be on flexibility onto mobile devices, such as android tablets/iPad etc.
To achieve this the theme relies considerably on css3 and so MAY NOT BE SUITABLE for older browsers, especially 'older' IE variations. MS filters have been used to replicate some standard css3 features as nearly as possible to attempt to give a similar user experience in IE, although some have not proved practical (e.g. there is no gradient on the block headers in IE as I have been unable to make the gradient filter allow for the rounded corners)
For more information check out the webpage link below