Site doesn't validate?

I’m trying to get my site to validate, but what do these errors mean, how do I get rid of them?


and is that cause im trying to use css3?

Yes, the errors are caused by using CSS3 and validating through a CSS2 validator.

Go here and choose CSS3 from the drop down then enter the link to your site into the box or drop your CSS in the box on the “direct input” tab.