No, that's just the Mac version of the icon, which we consider the canonical version. The Windows/Linux one has less-rounded corners to fit in better with platform conventions (such as they are).
Oh, good to know, because I thought that the icon with the more rounded corners is the most recent one and is valid for all platforms, as it was shown in the official release notes:
Anyway, you are doing an awesome work, huge thanks!
The old icon was totally different:
Anyway, you are doing an awesome work, huge thanks!