Today is the day when we all be freeing our I phone from the baseband lock. We have told before that Sunday 28 November 2010 will be the day when you will be able to use your Iphone as normal. Muscle nerd the Dev Team member tweeted for all the millions of people waiting for this unlocks:

Now what does the red badge means and safe?

It means the update badge on top of Cydia. MuscleNerd replied to a person on asking about the question.
Safe means that they are keeping the new unlock safe for people who are on old bootrooms and basebands. They don’t want to break ultrasn0w for those who it currently works for. Even if they’re on a very old baseband or firmware.