[whamlastxmas]

It is safe. It's safe in the same way that your valuables locked inside a 4 ton safe in your basement are safe. Or in the same way that being a passenger on a plane is safe. Or even in the same way that SSL is safe.

From the report you linked:

> While CS believes these calls will succeed in all normal scenarios, at least one unusual scenario would cause the calls to fail and rely on poor sources of entropy

Essentially, there are outlying circumstances in which it might be more vulnerable than usual, which is true of pretty much anything.