As you may or may not know, there has been some reports recently about security regarding the software that is used by many servers that host many websites. Rather than me try and explain it they have kindly written a blog for you and what it means to your security.
blog.healthunlocked.com/pos...
They have logged everyone out and suggest that when you log in you change your password.
This breach is related to many sites world wide, not just this one.