Gridset CSS + Selectivizr in older Internet Explorer
If you are using Selectivizr (http://selectivizr.com/) for IE compatibility, you may run into trouble with the Gridset CSS for IE8. Gridset uses attribute selectors to keep its CSS size down, and these selectors will work in IE7 and up. Selectivizr interrupts the use of attribute selectors in IE, which will cause the Gridset CSS to break (mostly margins and clearing).
If you can remove Selectivizr, we recommend doing so. If not, hosting your Gridset CSS at a separate domain or subdomain will also work.