Been useing the beta for awhile with no issues and RC1 seems to work fine as well..

Neowin.net - Internet Explorer 9 RC download link goes live (http://www.neowin.net/news/internet-explorer-9-rc-download-link-goes-live)

Another link..

Internet Explorer 9 Release Candidate (RC) now available to download | WinRumors (http://www.winrumors.com/internet-explorer-9-release-candidate-rc-now-available-to-download/)

I too have used IE9 and I prefer the older UI. With that said, I still use FF 99% of the time

Yeah well RC1 works fine and is fast as well..