Re: cuve work in ie6,7 but not in ie8
All features work just fine in IE8. But sometimes there are other factors which cause problems. You'll have to give more information, like:
* When you say it "cannot work in IE8", what exactly do you see? Do your corners stay square, does the background/border disappear entirely, or something else?
* Can you post a code snippet demonstrating your problem?
Also, please make sure you've read the Known Issues documentation page to make sure you're not running into any of the frequently encountered problems: http://css3pie.com/documentation/known-issues/
-- most often people run into the first section regarding z-index.