I\'m using the CSS3Pie htc file to enable border-radius in IE8, but I\'m getting no effect. My CSS is:
button {
border-radius: 4px;
-web
I actually had this problem for a completely different reason.
The border-radius will not work if a filter is applied to the same element. I was applying the border-radius to a button with a linear gradient applied as a filter. As soon as I removed the filter the border-radius worked.
This is documented behaviour and gradients should be applied using -pie-background:
http://css3pie.com/documentation/supported-css3-features/#gradients