Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Deconstruction Of Apples October 23rd iPad Mini Invitation
Apple sent out invitations to the October 23rd keynote in which we are expecting to see the iPad Mini. After Apple sent out the invitations people took it upon them self to see what information they can try and find by over analysing the graphics and words on the invitations its self , people do this every time we see invitations for an Apple keynote.