The large, prominent Star Trek Online MMO community on Reddit is beginning to note reports of the game crashing immediately on the loading screen (with a "Gameclient.exe has stopped working" explanation) for users of AMD GPUs who have upgraded their drivers to the new Crimson driver today. Suspicion is the driver itself as rollback to previous catalyst drivers (i.e. Catalyst 15.11) has remedied the issue to allow for game play. The crash is not necessarily universal, as a user of a R290x reports no issues.
Obviously, anything that can be done to remedy the situation to allow for gameplay and use of the nice new Crimson driver would be lauded by many.