IE10 in the Windows 8 Release Preview
supports the W3C Candidate Recommendation for CSS Gradients
in their unprefixed form. IE10 also supports the older CSS Gradients syntax
from the W3C Working Draft of 17 February 2011 behind the vendor prefix -ms-. This blog post describes the differences between the old and new syntax and behavior and provides some insight into the change.
[/h] Should you choose to simplify your CSS by making the move from vendor-prefixed CSS3 Gradients to unprefixed CSS3 Gradients, there are some key syntax changes to be aware of. Many gradient generators have provided cross-browser markup, including markup for unprefixed gradients. In many cases, the unprefixed markup is no longer valid according to the CSS Image Values W3C Candidate Recommendation
that covers gradients. Here are the changes you should be aware of.