Yes I am shure there has been some updates in between versions.

Since you have had no problems with your current RC I suggest you wait
for the official Windows Update in mid mars.

Since there still are some issues even with this final version, by the time it is available for download,
several SP1 updates will also be available there.

About the warnings...
This is just a way to say "Don't blame me for what I just did"...
The SP1 update can still be uninstalled if you don't like it.

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